./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:48:42,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:48:42,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:48:42,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:48:42,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:48:42,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:48:42,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:48:42,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:48:42,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:48:42,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:48:42,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:48:42,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:48:42,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:48:42,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:48:42,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:48:42,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:48:42,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:48:42,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:48:42,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:48:42,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:48:42,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:48:42,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:48:42,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:48:42,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:48:42,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:48:42,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:48:42,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:48:42,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:48:42,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:48:42,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:48:42,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:48:42,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:48:42,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:48:42,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:48:42,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:48:42,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:48:42,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:48:42,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:48:42,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:48:42,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:48:42,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:48:42,313 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:48:42,327 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:48:42,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:48:42,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:48:42,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:48:42,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:48:42,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:48:42,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:48:42,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:48:42,328 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:48:42,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:48:42,328 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:48:42,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:48:42,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:48:42,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:48:42,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:48:42,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:48:42,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:48:42,329 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:48:42,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:48:42,329 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:48:42,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:48:42,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:48:42,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:48:42,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:48:42,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:48:42,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:48:42,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:48:42,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:48:42,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:48:42,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:48:42,330 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:48:42,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:48:42,330 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:48:42,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:48:42,331 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:48:42,331 INFO L138 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_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2022-12-13 15:48:42,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:48:42,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:48:42,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:48:42,554 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:48:42,554 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:48:42,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-12-13 15:48:45,169 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:48:45,351 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:48:45,351 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-12-13 15:48:45,357 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/data/5288374dd/da5b0486fb5e4771a4fe3a0c44b5b513/FLAGf68823e53 [2022-12-13 15:48:45,744 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/data/5288374dd/da5b0486fb5e4771a4fe3a0c44b5b513 [2022-12-13 15:48:45,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:48:45,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:48:45,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:48:45,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:48:45,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:48:45,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:48:45" (1/1) ... [2022-12-13 15:48:45,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58df9475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:45, skipping insertion in model container [2022-12-13 15:48:45,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:48:45" (1/1) ... [2022-12-13 15:48:45,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:48:45,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:48:45,888 WARN L237 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_2793b581-d3e8-49c2-a583-77aac94f7834/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-12-13 15:48:45,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:48:45,946 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:48:45,954 WARN L237 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_2793b581-d3e8-49c2-a583-77aac94f7834/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-12-13 15:48:45,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:48:46,002 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:48:46,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46 WrapperNode [2022-12-13 15:48:46,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:48:46,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:48:46,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:48:46,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:48:46,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,042 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 201 [2022-12-13 15:48:46,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:48:46,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:48:46,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:48:46,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:48:46,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,071 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:48:46,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:48:46,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:48:46,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:48:46,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (1/1) ... [2022-12-13 15:48:46,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:48:46,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:46,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:48:46,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:48:46,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:48:46,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:48:46,144 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-12-13 15:48:46,144 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-12-13 15:48:46,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:48:46,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:48:46,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 15:48:46,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 15:48:46,211 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:48:46,213 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:48:46,553 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:48:46,561 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:48:46,562 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 15:48:46,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:48:46 BoogieIcfgContainer [2022-12-13 15:48:46,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:48:46,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:48:46,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:48:46,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:48:46,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:48:45" (1/3) ... [2022-12-13 15:48:46,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623786fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:48:46, skipping insertion in model container [2022-12-13 15:48:46,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:48:46" (2/3) ... [2022-12-13 15:48:46,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623786fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:48:46, skipping insertion in model container [2022-12-13 15:48:46,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:48:46" (3/3) ... [2022-12-13 15:48:46,573 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2022-12-13 15:48:46,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:48:46,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:48:46,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:48:46,645 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5e0a98e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:48:46,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 15:48:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 84 states have internal predecessors, (132), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 15:48:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 15:48:46,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:46,660 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:46,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:46,666 INFO L85 PathProgramCache]: Analyzing trace with hash 906811198, now seen corresponding path program 1 times [2022-12-13 15:48:46,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:46,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602704797] [2022-12-13 15:48:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:46,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:46,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:46,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:46,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:46,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:46,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602704797] [2022-12-13 15:48:46,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602704797] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:46,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:46,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:48:46,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144252394] [2022-12-13 15:48:46,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:46,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:46,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:46,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:46,957 INFO L87 Difference]: Start difference. First operand has 94 states, 81 states have (on average 1.6296296296296295) internal successors, (132), 84 states have internal predecessors, (132), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:47,006 INFO L93 Difference]: Finished difference Result 235 states and 390 transitions. [2022-12-13 15:48:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:47,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-12-13 15:48:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:47,016 INFO L225 Difference]: With dead ends: 235 [2022-12-13 15:48:47,017 INFO L226 Difference]: Without dead ends: 136 [2022-12-13 15:48:47,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:47,022 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 63 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:47,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-13 15:48:47,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2022-12-13 15:48:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 111 states have (on average 1.5405405405405406) internal successors, (171), 113 states have internal predecessors, (171), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 15:48:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 194 transitions. [2022-12-13 15:48:47,058 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 194 transitions. Word has length 37 [2022-12-13 15:48:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:47,059 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 194 transitions. [2022-12-13 15:48:47,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 194 transitions. [2022-12-13 15:48:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 15:48:47,062 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:47,062 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:47,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:48:47,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:47,063 INFO L85 PathProgramCache]: Analyzing trace with hash 804838827, now seen corresponding path program 1 times [2022-12-13 15:48:47,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:47,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862254697] [2022-12-13 15:48:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:47,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:47,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:47,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:47,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:47,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:47,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862254697] [2022-12-13 15:48:47,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862254697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:47,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:47,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:48:47,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296195298] [2022-12-13 15:48:47,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:47,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:47,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:47,161 INFO L87 Difference]: Start difference. First operand 126 states and 194 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:47,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:47,187 INFO L93 Difference]: Finished difference Result 228 states and 353 transitions. [2022-12-13 15:48:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:47,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-12-13 15:48:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:47,189 INFO L225 Difference]: With dead ends: 228 [2022-12-13 15:48:47,189 INFO L226 Difference]: Without dead ends: 192 [2022-12-13 15:48:47,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:47,190 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 55 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:47,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 272 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-13 15:48:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2022-12-13 15:48:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 162 states have (on average 1.5185185185185186) internal successors, (246), 165 states have internal predecessors, (246), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-13 15:48:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 280 transitions. [2022-12-13 15:48:47,209 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 280 transitions. Word has length 39 [2022-12-13 15:48:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:47,210 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 280 transitions. [2022-12-13 15:48:47,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 280 transitions. [2022-12-13 15:48:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 15:48:47,212 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:47,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:48:47,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1821406099, now seen corresponding path program 1 times [2022-12-13 15:48:47,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:47,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544104448] [2022-12-13 15:48:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:47,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:47,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:47,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:47,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:47,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:47,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544104448] [2022-12-13 15:48:47,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544104448] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:47,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775855645] [2022-12-13 15:48:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:47,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:47,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:47,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:47,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:48:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:47,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:48:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 15:48:47,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:48:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:47,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775855645] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:47,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:48:47,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 12 [2022-12-13 15:48:47,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80221820] [2022-12-13 15:48:47,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:47,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:47,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:48:47,677 INFO L87 Difference]: Start difference. First operand 183 states and 280 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:47,704 INFO L93 Difference]: Finished difference Result 319 states and 484 transitions. [2022-12-13 15:48:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:47,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-12-13 15:48:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:47,706 INFO L225 Difference]: With dead ends: 319 [2022-12-13 15:48:47,706 INFO L226 Difference]: Without dead ends: 215 [2022-12-13 15:48:47,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:48:47,708 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 64 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:47,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-12-13 15:48:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 183. [2022-12-13 15:48:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 162 states have (on average 1.4938271604938271) internal successors, (242), 165 states have internal predecessors, (242), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-13 15:48:47,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 276 transitions. [2022-12-13 15:48:47,726 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 276 transitions. Word has length 40 [2022-12-13 15:48:47,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:47,727 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 276 transitions. [2022-12-13 15:48:47,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:47,727 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 276 transitions. [2022-12-13 15:48:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 15:48:47,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:47,729 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:47,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:48:47,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 15:48:47,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:47,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:47,931 INFO L85 PathProgramCache]: Analyzing trace with hash -363711082, now seen corresponding path program 1 times [2022-12-13 15:48:47,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:47,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545667988] [2022-12-13 15:48:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:47,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:48,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:48,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545667988] [2022-12-13 15:48:48,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545667988] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:48,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:48,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:48:48,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516871229] [2022-12-13 15:48:48,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:48,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:48:48,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:48,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:48:48,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:48:48,026 INFO L87 Difference]: Start difference. First operand 183 states and 276 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:48,076 INFO L93 Difference]: Finished difference Result 291 states and 442 transitions. [2022-12-13 15:48:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:48:48,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-12-13 15:48:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:48,079 INFO L225 Difference]: With dead ends: 291 [2022-12-13 15:48:48,079 INFO L226 Difference]: Without dead ends: 262 [2022-12-13 15:48:48,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:48:48,080 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 147 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:48,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 477 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-12-13 15:48:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 228. [2022-12-13 15:48:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 202 states have (on average 1.5) internal successors, (303), 206 states have internal predecessors, (303), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-13 15:48:48,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 347 transitions. [2022-12-13 15:48:48,092 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 347 transitions. Word has length 40 [2022-12-13 15:48:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:48,092 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 347 transitions. [2022-12-13 15:48:48,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:48,092 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 347 transitions. [2022-12-13 15:48:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 15:48:48,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:48,093 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:48,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:48:48,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:48,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:48,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1384779436, now seen corresponding path program 1 times [2022-12-13 15:48:48,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:48,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94228961] [2022-12-13 15:48:48,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:48,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:48,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:48,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94228961] [2022-12-13 15:48:48,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94228961] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:48,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:48,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:48:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143203087] [2022-12-13 15:48:48,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:48,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:48:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:48:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:48,128 INFO L87 Difference]: Start difference. First operand 228 states and 347 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:48,141 INFO L93 Difference]: Finished difference Result 241 states and 363 transitions. [2022-12-13 15:48:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:48:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-12-13 15:48:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:48,142 INFO L225 Difference]: With dead ends: 241 [2022-12-13 15:48:48,142 INFO L226 Difference]: Without dead ends: 234 [2022-12-13 15:48:48,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:48:48,143 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:48,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 268 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-12-13 15:48:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2022-12-13 15:48:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 203 states have (on average 1.4975369458128078) internal successors, (304), 207 states have internal predecessors, (304), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-13 15:48:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 348 transitions. [2022-12-13 15:48:48,153 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 348 transitions. Word has length 40 [2022-12-13 15:48:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:48,153 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 348 transitions. [2022-12-13 15:48:48,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:48,153 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 348 transitions. [2022-12-13 15:48:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 15:48:48,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:48,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:48,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:48:48,155 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:48,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:48,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1398619051, now seen corresponding path program 1 times [2022-12-13 15:48:48,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:48,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53245381] [2022-12-13 15:48:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:48,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:48,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:48,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53245381] [2022-12-13 15:48:48,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53245381] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:48,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931023361] [2022-12-13 15:48:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:48,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:48,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:48,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:48,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:48:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:48,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:48:48,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:48,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:48:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:48,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931023361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:48:48,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:48:48,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-13 15:48:48,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835653257] [2022-12-13 15:48:48,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:48:48,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:48:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:48:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:48:48,500 INFO L87 Difference]: Start difference. First operand 229 states and 348 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 15:48:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:48,749 INFO L93 Difference]: Finished difference Result 762 states and 1158 transitions. [2022-12-13 15:48:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:48:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2022-12-13 15:48:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:48,752 INFO L225 Difference]: With dead ends: 762 [2022-12-13 15:48:48,753 INFO L226 Difference]: Without dead ends: 576 [2022-12-13 15:48:48,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:48:48,754 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 576 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:48,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 1513 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:48:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-12-13 15:48:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 359. [2022-12-13 15:48:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 320 states have (on average 1.465625) internal successors, (469), 325 states have internal predecessors, (469), 35 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (37), 34 states have call predecessors, (37), 33 states have call successors, (37) [2022-12-13 15:48:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 541 transitions. [2022-12-13 15:48:48,771 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 541 transitions. Word has length 41 [2022-12-13 15:48:48,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:48,771 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 541 transitions. [2022-12-13 15:48:48,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 15:48:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 541 transitions. [2022-12-13 15:48:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 15:48:48,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:48,772 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:48,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:48:48,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:48,974 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:48,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1616484567, now seen corresponding path program 1 times [2022-12-13 15:48:48,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:48,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606730266] [2022-12-13 15:48:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:48,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:49,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:49,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606730266] [2022-12-13 15:48:49,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606730266] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:49,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:49,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:48:49,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811231586] [2022-12-13 15:48:49,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:49,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:48:49,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:49,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:48:49,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:48:49,195 INFO L87 Difference]: Start difference. First operand 359 states and 541 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:49,303 INFO L93 Difference]: Finished difference Result 779 states and 1170 transitions. [2022-12-13 15:48:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:48:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-12-13 15:48:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:49,305 INFO L225 Difference]: With dead ends: 779 [2022-12-13 15:48:49,306 INFO L226 Difference]: Without dead ends: 473 [2022-12-13 15:48:49,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:48:49,307 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 75 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:49,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 735 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:48:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-12-13 15:48:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2022-12-13 15:48:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 424 states have (on average 1.4103773584905661) internal successors, (598), 430 states have internal predecessors, (598), 41 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (43), 42 states have call predecessors, (43), 39 states have call successors, (43) [2022-12-13 15:48:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 682 transitions. [2022-12-13 15:48:49,342 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 682 transitions. Word has length 41 [2022-12-13 15:48:49,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:49,342 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 682 transitions. [2022-12-13 15:48:49,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 682 transitions. [2022-12-13 15:48:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 15:48:49,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:49,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:49,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:48:49,344 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:49,345 INFO L85 PathProgramCache]: Analyzing trace with hash 337909198, now seen corresponding path program 1 times [2022-12-13 15:48:49,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:49,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991020937] [2022-12-13 15:48:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:49,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:49,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:49,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991020937] [2022-12-13 15:48:49,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991020937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:49,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:49,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:48:49,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299157371] [2022-12-13 15:48:49,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:49,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:48:49,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:48:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:48:49,413 INFO L87 Difference]: Start difference. First operand 469 states and 682 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:49,447 INFO L93 Difference]: Finished difference Result 476 states and 688 transitions. [2022-12-13 15:48:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:48:49,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-12-13 15:48:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:49,449 INFO L225 Difference]: With dead ends: 476 [2022-12-13 15:48:49,449 INFO L226 Difference]: Without dead ends: 469 [2022-12-13 15:48:49,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:48:49,450 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 5 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 528 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 [2022-12-13 15:48:49,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 528 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-12-13 15:48:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2022-12-13 15:48:49,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 422 states have (on average 1.40521327014218) internal successors, (593), 428 states have internal predecessors, (593), 41 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (43), 42 states have call predecessors, (43), 39 states have call successors, (43) [2022-12-13 15:48:49,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 677 transitions. [2022-12-13 15:48:49,470 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 677 transitions. Word has length 42 [2022-12-13 15:48:49,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:49,471 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 677 transitions. [2022-12-13 15:48:49,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:49,471 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 677 transitions. [2022-12-13 15:48:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 15:48:49,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:49,472 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:49,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:48:49,472 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:49,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1951760518, now seen corresponding path program 1 times [2022-12-13 15:48:49,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:49,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6926142] [2022-12-13 15:48:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:49,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:49,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:49,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6926142] [2022-12-13 15:48:49,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6926142] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:49,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:49,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:48:49,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5971559] [2022-12-13 15:48:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:49,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:48:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:48:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:48:49,518 INFO L87 Difference]: Start difference. First operand 467 states and 677 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:49,556 INFO L93 Difference]: Finished difference Result 517 states and 742 transitions. [2022-12-13 15:48:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:48:49,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-12-13 15:48:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:49,558 INFO L225 Difference]: With dead ends: 517 [2022-12-13 15:48:49,558 INFO L226 Difference]: Without dead ends: 443 [2022-12-13 15:48:49,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:48:49,559 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 115 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:49,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 435 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:49,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-12-13 15:48:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 347. [2022-12-13 15:48:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 316 states have (on average 1.370253164556962) internal successors, (433), 318 states have internal predecessors, (433), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (29), 28 states have call predecessors, (29), 25 states have call successors, (29) [2022-12-13 15:48:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 489 transitions. [2022-12-13 15:48:49,572 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 489 transitions. Word has length 43 [2022-12-13 15:48:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:49,572 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 489 transitions. [2022-12-13 15:48:49,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 489 transitions. [2022-12-13 15:48:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 15:48:49,573 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:49,573 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:49,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:48:49,573 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:49,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1645353096, now seen corresponding path program 1 times [2022-12-13 15:48:49,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:49,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577661099] [2022-12-13 15:48:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:49,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:49,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:49,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577661099] [2022-12-13 15:48:49,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577661099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:49,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:49,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:48:49,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384788805] [2022-12-13 15:48:49,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:49,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:48:49,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:49,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:48:49,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:48:49,649 INFO L87 Difference]: Start difference. First operand 347 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:49,800 INFO L93 Difference]: Finished difference Result 876 states and 1271 transitions. [2022-12-13 15:48:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:48:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-12-13 15:48:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:49,803 INFO L225 Difference]: With dead ends: 876 [2022-12-13 15:48:49,803 INFO L226 Difference]: Without dead ends: 728 [2022-12-13 15:48:49,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:48:49,804 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 179 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:49,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1116 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:48:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-12-13 15:48:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 442. [2022-12-13 15:48:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 410 states have (on average 1.3780487804878048) internal successors, (565), 411 states have internal predecessors, (565), 27 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (33), 30 states have call predecessors, (33), 25 states have call successors, (33) [2022-12-13 15:48:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 625 transitions. [2022-12-13 15:48:49,827 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 625 transitions. Word has length 45 [2022-12-13 15:48:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:49,827 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 625 transitions. [2022-12-13 15:48:49,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 625 transitions. [2022-12-13 15:48:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 15:48:49,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:49,828 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:49,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:48:49,828 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:49,828 INFO L85 PathProgramCache]: Analyzing trace with hash 836006470, now seen corresponding path program 1 times [2022-12-13 15:48:49,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:49,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772443516] [2022-12-13 15:48:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:49,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:49,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:49,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772443516] [2022-12-13 15:48:49,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772443516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:49,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845859846] [2022-12-13 15:48:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:49,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:49,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:49,926 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:49,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:48:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:49,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:48:49,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 15:48:50,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:48:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:50,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845859846] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:50,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:48:50,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 12 [2022-12-13 15:48:50,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668362293] [2022-12-13 15:48:50,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:50,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:48:50,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:48:50,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:48:50,099 INFO L87 Difference]: Start difference. First operand 442 states and 625 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:50,137 INFO L93 Difference]: Finished difference Result 646 states and 902 transitions. [2022-12-13 15:48:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:48:50,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-12-13 15:48:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:50,139 INFO L225 Difference]: With dead ends: 646 [2022-12-13 15:48:50,139 INFO L226 Difference]: Without dead ends: 414 [2022-12-13 15:48:50,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:48:50,140 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 98 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:50,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 318 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-12-13 15:48:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 352. [2022-12-13 15:48:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 326 states have (on average 1.3466257668711656) internal successors, (439), 328 states have internal predecessors, (439), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (27), 23 states have call predecessors, (27), 19 states have call successors, (27) [2022-12-13 15:48:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 487 transitions. [2022-12-13 15:48:50,154 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 487 transitions. Word has length 45 [2022-12-13 15:48:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:50,155 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 487 transitions. [2022-12-13 15:48:50,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 487 transitions. [2022-12-13 15:48:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 15:48:50,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:50,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:50,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:48:50,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 15:48:50,356 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:50,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:50,356 INFO L85 PathProgramCache]: Analyzing trace with hash 980602509, now seen corresponding path program 1 times [2022-12-13 15:48:50,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:50,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103528640] [2022-12-13 15:48:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:50,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 15:48:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:50,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:50,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103528640] [2022-12-13 15:48:50,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103528640] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:50,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:50,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:48:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100152665] [2022-12-13 15:48:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:50,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:48:50,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:48:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:48:50,398 INFO L87 Difference]: Start difference. First operand 352 states and 487 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:50,443 INFO L93 Difference]: Finished difference Result 580 states and 799 transitions. [2022-12-13 15:48:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:48:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-12-13 15:48:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:50,445 INFO L225 Difference]: With dead ends: 580 [2022-12-13 15:48:50,445 INFO L226 Difference]: Without dead ends: 540 [2022-12-13 15:48:50,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:48:50,446 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 124 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:50,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 456 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-12-13 15:48:50,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 390. [2022-12-13 15:48:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 363 states have (on average 1.3471074380165289) internal successors, (489), 364 states have internal predecessors, (489), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2022-12-13 15:48:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 539 transitions. [2022-12-13 15:48:50,461 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 539 transitions. Word has length 45 [2022-12-13 15:48:50,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:50,461 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 539 transitions. [2022-12-13 15:48:50,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:50,461 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 539 transitions. [2022-12-13 15:48:50,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 15:48:50,462 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:50,462 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:50,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:48:50,462 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash 828308281, now seen corresponding path program 1 times [2022-12-13 15:48:50,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:50,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759627833] [2022-12-13 15:48:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:50,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:50,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:50,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759627833] [2022-12-13 15:48:50,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759627833] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:50,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:50,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:48:50,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155540450] [2022-12-13 15:48:50,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:50,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:48:50,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:50,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:48:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:48:50,509 INFO L87 Difference]: Start difference. First operand 390 states and 539 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:50,533 INFO L93 Difference]: Finished difference Result 406 states and 556 transitions. [2022-12-13 15:48:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:48:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-12-13 15:48:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:50,534 INFO L225 Difference]: With dead ends: 406 [2022-12-13 15:48:50,534 INFO L226 Difference]: Without dead ends: 390 [2022-12-13 15:48:50,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:48:50,535 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 1 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:50,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 393 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-12-13 15:48:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-12-13 15:48:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 363 states have (on average 1.3415977961432506) internal successors, (487), 364 states have internal predecessors, (487), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2022-12-13 15:48:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 537 transitions. [2022-12-13 15:48:50,549 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 537 transitions. Word has length 46 [2022-12-13 15:48:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:50,549 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 537 transitions. [2022-12-13 15:48:50,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 537 transitions. [2022-12-13 15:48:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 15:48:50,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:50,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:50,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 15:48:50,550 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:50,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash 127243703, now seen corresponding path program 1 times [2022-12-13 15:48:50,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:50,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394313917] [2022-12-13 15:48:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:50,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:50,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:50,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394313917] [2022-12-13 15:48:50,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394313917] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:50,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031786382] [2022-12-13 15:48:50,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:50,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:50,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:50,708 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:50,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:48:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:50,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:48:50,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:48:50,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:48:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:50,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031786382] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:48:50,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:48:50,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2022-12-13 15:48:50,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021529004] [2022-12-13 15:48:50,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:48:50,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:48:50,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:50,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:48:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:48:50,952 INFO L87 Difference]: Start difference. First operand 390 states and 537 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-13 15:48:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:51,520 INFO L93 Difference]: Finished difference Result 726 states and 1003 transitions. [2022-12-13 15:48:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:48:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2022-12-13 15:48:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:51,522 INFO L225 Difference]: With dead ends: 726 [2022-12-13 15:48:51,522 INFO L226 Difference]: Without dead ends: 339 [2022-12-13 15:48:51,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-12-13 15:48:51,524 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 320 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:51,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 2042 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:48:51,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-12-13 15:48:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 266. [2022-12-13 15:48:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 244 states have (on average 1.3278688524590163) internal successors, (324), 244 states have internal predecessors, (324), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (24), 19 states have call predecessors, (24), 15 states have call successors, (24) [2022-12-13 15:48:51,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 364 transitions. [2022-12-13 15:48:51,541 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 364 transitions. Word has length 46 [2022-12-13 15:48:51,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:51,542 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 364 transitions. [2022-12-13 15:48:51,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-13 15:48:51,542 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 364 transitions. [2022-12-13 15:48:51,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 15:48:51,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:51,543 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:48:51,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:48:51,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 15:48:51,744 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:51,744 INFO L85 PathProgramCache]: Analyzing trace with hash 705038931, now seen corresponding path program 1 times [2022-12-13 15:48:51,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:51,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705538436] [2022-12-13 15:48:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:51,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:51,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:51,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:51,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:51,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705538436] [2022-12-13 15:48:51,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705538436] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:51,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698441174] [2022-12-13 15:48:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:51,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:51,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:51,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:51,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:48:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:48:51,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:52,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:52,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698441174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:52,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:48:52,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-13 15:48:52,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743205551] [2022-12-13 15:48:52,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:52,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:48:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:52,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:48:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:48:52,019 INFO L87 Difference]: Start difference. First operand 266 states and 364 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:52,171 INFO L93 Difference]: Finished difference Result 428 states and 595 transitions. [2022-12-13 15:48:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:48:52,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-12-13 15:48:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:52,173 INFO L225 Difference]: With dead ends: 428 [2022-12-13 15:48:52,173 INFO L226 Difference]: Without dead ends: 355 [2022-12-13 15:48:52,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:48:52,174 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 132 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:52,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 716 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:48:52,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-12-13 15:48:52,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 296. [2022-12-13 15:48:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 266 states have (on average 1.3421052631578947) internal successors, (357), 269 states have internal predecessors, (357), 24 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (27), 24 states have call predecessors, (27), 22 states have call successors, (27) [2022-12-13 15:48:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 408 transitions. [2022-12-13 15:48:52,203 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 408 transitions. Word has length 48 [2022-12-13 15:48:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:52,203 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 408 transitions. [2022-12-13 15:48:52,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 408 transitions. [2022-12-13 15:48:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 15:48:52,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:52,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:52,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:48:52,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:52,405 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:52,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1641997822, now seen corresponding path program 1 times [2022-12-13 15:48:52,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:52,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192585261] [2022-12-13 15:48:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:52,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:52,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:52,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:52,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 15:48:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 15:48:52,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:52,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192585261] [2022-12-13 15:48:52,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192585261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:52,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747483760] [2022-12-13 15:48:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:52,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:52,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:52,540 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:52,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:48:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:52,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 15:48:52,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 15:48:52,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:52,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747483760] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:52,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:48:52,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 15 [2022-12-13 15:48:52,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146121017] [2022-12-13 15:48:52,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:52,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:48:52,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:52,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:48:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:48:52,801 INFO L87 Difference]: Start difference. First operand 296 states and 408 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 15:48:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:53,259 INFO L93 Difference]: Finished difference Result 826 states and 1149 transitions. [2022-12-13 15:48:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:48:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-12-13 15:48:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:53,263 INFO L225 Difference]: With dead ends: 826 [2022-12-13 15:48:53,263 INFO L226 Difference]: Without dead ends: 582 [2022-12-13 15:48:53,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:48:53,265 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 516 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:53,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1107 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:48:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-12-13 15:48:53,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 532. [2022-12-13 15:48:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 480 states have (on average 1.3020833333333333) internal successors, (625), 484 states have internal predecessors, (625), 46 states have call successors, (46), 3 states have call predecessors, (46), 5 states have return successors, (49), 47 states have call predecessors, (49), 43 states have call successors, (49) [2022-12-13 15:48:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 720 transitions. [2022-12-13 15:48:53,306 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 720 transitions. Word has length 49 [2022-12-13 15:48:53,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:53,306 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 720 transitions. [2022-12-13 15:48:53,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 15:48:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 720 transitions. [2022-12-13 15:48:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 15:48:53,308 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:53,308 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:53,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 15:48:53,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:53,509 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:53,509 INFO L85 PathProgramCache]: Analyzing trace with hash 164141512, now seen corresponding path program 1 times [2022-12-13 15:48:53,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:53,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052226794] [2022-12-13 15:48:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:53,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:53,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:53,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:53,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:48:53,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:53,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052226794] [2022-12-13 15:48:53,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052226794] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:53,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352504057] [2022-12-13 15:48:53,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:53,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:53,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:53,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:53,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:48:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:53,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 15:48:53,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:48:54,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:54,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352504057] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:54,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:48:54,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 24 [2022-12-13 15:48:54,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322945581] [2022-12-13 15:48:54,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:54,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:48:54,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:54,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:48:54,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:48:54,168 INFO L87 Difference]: Start difference. First operand 532 states and 720 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:54,565 INFO L93 Difference]: Finished difference Result 963 states and 1327 transitions. [2022-12-13 15:48:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:48:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-12-13 15:48:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:54,569 INFO L225 Difference]: With dead ends: 963 [2022-12-13 15:48:54,569 INFO L226 Difference]: Without dead ends: 841 [2022-12-13 15:48:54,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-12-13 15:48:54,571 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 357 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:54,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1423 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:48:54,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-12-13 15:48:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 712. [2022-12-13 15:48:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 640 states have (on average 1.296875) internal successors, (830), 645 states have internal predecessors, (830), 66 states have call successors, (66), 3 states have call predecessors, (66), 5 states have return successors, (69), 68 states have call predecessors, (69), 63 states have call successors, (69) [2022-12-13 15:48:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 965 transitions. [2022-12-13 15:48:54,628 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 965 transitions. Word has length 50 [2022-12-13 15:48:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:54,629 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 965 transitions. [2022-12-13 15:48:54,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 965 transitions. [2022-12-13 15:48:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 15:48:54,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:54,630 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:54,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:48:54,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 15:48:54,831 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:54,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1732806460, now seen corresponding path program 1 times [2022-12-13 15:48:54,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:54,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929277073] [2022-12-13 15:48:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:54,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:54,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:54,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:54,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:54,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:54,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929277073] [2022-12-13 15:48:54,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929277073] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:54,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:54,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:48:54,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31878311] [2022-12-13 15:48:54,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:54,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:48:54,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:48:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:48:54,895 INFO L87 Difference]: Start difference. First operand 712 states and 965 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:54,951 INFO L93 Difference]: Finished difference Result 721 states and 973 transitions. [2022-12-13 15:48:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:48:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-12-13 15:48:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:54,954 INFO L225 Difference]: With dead ends: 721 [2022-12-13 15:48:54,954 INFO L226 Difference]: Without dead ends: 686 [2022-12-13 15:48:54,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:48:54,955 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:54,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 384 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-12-13 15:48:54,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 662. [2022-12-13 15:48:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 596 states have (on average 1.2986577181208054) internal successors, (774), 601 states have internal predecessors, (774), 60 states have call successors, (60), 3 states have call predecessors, (60), 5 states have return successors, (62), 61 states have call predecessors, (62), 57 states have call successors, (62) [2022-12-13 15:48:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 896 transitions. [2022-12-13 15:48:54,999 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 896 transitions. Word has length 52 [2022-12-13 15:48:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:54,999 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 896 transitions. [2022-12-13 15:48:54,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 896 transitions. [2022-12-13 15:48:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 15:48:55,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:55,001 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:55,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 15:48:55,001 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:55,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:55,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1348659453, now seen corresponding path program 1 times [2022-12-13 15:48:55,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:55,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963318706] [2022-12-13 15:48:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:55,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:55,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:55,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:55,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:55,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:55,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963318706] [2022-12-13 15:48:55,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963318706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:55,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:55,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:48:55,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923654409] [2022-12-13 15:48:55,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:55,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:48:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:55,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:48:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:48:55,214 INFO L87 Difference]: Start difference. First operand 662 states and 896 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:55,625 INFO L93 Difference]: Finished difference Result 882 states and 1199 transitions. [2022-12-13 15:48:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:48:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-12-13 15:48:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:55,629 INFO L225 Difference]: With dead ends: 882 [2022-12-13 15:48:55,629 INFO L226 Difference]: Without dead ends: 864 [2022-12-13 15:48:55,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:48:55,630 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 265 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:55,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 797 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:48:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-12-13 15:48:55,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 698. [2022-12-13 15:48:55,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 628 states have (on average 1.2961783439490446) internal successors, (814), 634 states have internal predecessors, (814), 64 states have call successors, (64), 3 states have call predecessors, (64), 5 states have return successors, (66), 65 states have call predecessors, (66), 61 states have call successors, (66) [2022-12-13 15:48:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 944 transitions. [2022-12-13 15:48:55,702 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 944 transitions. Word has length 53 [2022-12-13 15:48:55,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:55,702 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 944 transitions. [2022-12-13 15:48:55,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 944 transitions. [2022-12-13 15:48:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 15:48:55,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:55,704 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:55,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 15:48:55,704 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:55,704 INFO L85 PathProgramCache]: Analyzing trace with hash -38305071, now seen corresponding path program 1 times [2022-12-13 15:48:55,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:55,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987668673] [2022-12-13 15:48:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:55,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:55,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:55,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:55,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 15:48:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 15:48:55,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987668673] [2022-12-13 15:48:55,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987668673] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:55,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:55,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:48:55,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903818556] [2022-12-13 15:48:55,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:55,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:48:55,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:55,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:48:55,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:48:55,810 INFO L87 Difference]: Start difference. First operand 698 states and 944 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:55,915 INFO L93 Difference]: Finished difference Result 753 states and 1013 transitions. [2022-12-13 15:48:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:48:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-12-13 15:48:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:55,918 INFO L225 Difference]: With dead ends: 753 [2022-12-13 15:48:55,918 INFO L226 Difference]: Without dead ends: 751 [2022-12-13 15:48:55,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:48:55,918 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 41 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:55,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 669 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-12-13 15:48:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 710. [2022-12-13 15:48:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 635 states have (on average 1.2929133858267716) internal successors, (821), 645 states have internal predecessors, (821), 68 states have call successors, (68), 4 states have call predecessors, (68), 6 states have return successors, (70), 65 states have call predecessors, (70), 65 states have call successors, (70) [2022-12-13 15:48:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 959 transitions. [2022-12-13 15:48:55,965 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 959 transitions. Word has length 54 [2022-12-13 15:48:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:55,965 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 959 transitions. [2022-12-13 15:48:55,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 959 transitions. [2022-12-13 15:48:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 15:48:55,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:55,966 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:55,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 15:48:55,967 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:55,967 INFO L85 PathProgramCache]: Analyzing trace with hash 18953231, now seen corresponding path program 1 times [2022-12-13 15:48:55,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:55,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409689117] [2022-12-13 15:48:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:55,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:56,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:56,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:56,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 15:48:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 15:48:56,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:56,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409689117] [2022-12-13 15:48:56,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409689117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:56,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:56,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:48:56,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35797565] [2022-12-13 15:48:56,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:56,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:48:56,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:48:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:48:56,024 INFO L87 Difference]: Start difference. First operand 710 states and 959 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:56,120 INFO L93 Difference]: Finished difference Result 775 states and 1043 transitions. [2022-12-13 15:48:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:48:56,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2022-12-13 15:48:56,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:56,122 INFO L225 Difference]: With dead ends: 775 [2022-12-13 15:48:56,122 INFO L226 Difference]: Without dead ends: 773 [2022-12-13 15:48:56,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:48:56,123 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 39 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:56,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 697 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-12-13 15:48:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 718. [2022-12-13 15:48:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 638 states have (on average 1.29153605015674) internal successors, (824), 652 states have internal predecessors, (824), 72 states have call successors, (72), 5 states have call predecessors, (72), 7 states have return successors, (74), 65 states have call predecessors, (74), 69 states have call successors, (74) [2022-12-13 15:48:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 970 transitions. [2022-12-13 15:48:56,170 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 970 transitions. Word has length 54 [2022-12-13 15:48:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:56,170 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 970 transitions. [2022-12-13 15:48:56,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 970 transitions. [2022-12-13 15:48:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 15:48:56,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:56,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:56,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 15:48:56,172 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash -931744545, now seen corresponding path program 1 times [2022-12-13 15:48:56,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:56,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226191586] [2022-12-13 15:48:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:56,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:56,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:56,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:56,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 15:48:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 15:48:56,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:56,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226191586] [2022-12-13 15:48:56,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226191586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:56,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:48:56,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 15:48:56,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469119948] [2022-12-13 15:48:56,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:56,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:48:56,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:56,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:48:56,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:48:56,443 INFO L87 Difference]: Start difference. First operand 718 states and 970 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 15:48:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:56,900 INFO L93 Difference]: Finished difference Result 755 states and 1013 transitions. [2022-12-13 15:48:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:48:56,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-12-13 15:48:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:56,905 INFO L225 Difference]: With dead ends: 755 [2022-12-13 15:48:56,905 INFO L226 Difference]: Without dead ends: 753 [2022-12-13 15:48:56,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:48:56,906 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 261 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:56,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 2120 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:48:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-12-13 15:48:56,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 727. [2022-12-13 15:48:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 645 states have (on average 1.289922480620155) internal successors, (832), 660 states have internal predecessors, (832), 73 states have call successors, (73), 6 states have call predecessors, (73), 8 states have return successors, (75), 65 states have call predecessors, (75), 70 states have call successors, (75) [2022-12-13 15:48:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 980 transitions. [2022-12-13 15:48:56,953 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 980 transitions. Word has length 54 [2022-12-13 15:48:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:56,953 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 980 transitions. [2022-12-13 15:48:56,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 15:48:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 980 transitions. [2022-12-13 15:48:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 15:48:56,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:56,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:56,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 15:48:56,955 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1315627843, now seen corresponding path program 1 times [2022-12-13 15:48:56,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:56,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862498079] [2022-12-13 15:48:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:56,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:57,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:57,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:57,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 15:48:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:48:57,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:57,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862498079] [2022-12-13 15:48:57,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862498079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:57,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978709929] [2022-12-13 15:48:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:57,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:57,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:57,322 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:57,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:48:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:57,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 15:48:57,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:48:57,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:57,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978709929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:57,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:48:57,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 23 [2022-12-13 15:48:57,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904079626] [2022-12-13 15:48:57,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:57,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:48:57,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:57,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:48:57,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:48:57,449 INFO L87 Difference]: Start difference. First operand 727 states and 980 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:57,676 INFO L93 Difference]: Finished difference Result 922 states and 1252 transitions. [2022-12-13 15:48:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:48:57,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2022-12-13 15:48:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:57,681 INFO L225 Difference]: With dead ends: 922 [2022-12-13 15:48:57,681 INFO L226 Difference]: Without dead ends: 859 [2022-12-13 15:48:57,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-12-13 15:48:57,682 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 213 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:57,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 830 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:48:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-12-13 15:48:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 644. [2022-12-13 15:48:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 572 states have (on average 1.2902097902097902) internal successors, (738), 586 states have internal predecessors, (738), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2022-12-13 15:48:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 866 transitions. [2022-12-13 15:48:57,745 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 866 transitions. Word has length 55 [2022-12-13 15:48:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:57,745 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 866 transitions. [2022-12-13 15:48:57,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 866 transitions. [2022-12-13 15:48:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 15:48:57,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:57,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:57,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:48:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 15:48:57,948 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash 997951512, now seen corresponding path program 1 times [2022-12-13 15:48:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:57,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629378130] [2022-12-13 15:48:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:58,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:58,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:58,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 15:48:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:48:58,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:58,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629378130] [2022-12-13 15:48:58,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629378130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:58,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749191319] [2022-12-13 15:48:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:58,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:58,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:58,245 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:58,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:48:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:58,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 15:48:58,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 15:48:58,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:58,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749191319] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:58,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:48:58,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 20 [2022-12-13 15:48:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52665784] [2022-12-13 15:48:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:58,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:48:58,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:48:58,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:48:58,360 INFO L87 Difference]: Start difference. First operand 644 states and 866 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:58,527 INFO L93 Difference]: Finished difference Result 785 states and 1038 transitions. [2022-12-13 15:48:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:48:58,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2022-12-13 15:48:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:58,530 INFO L225 Difference]: With dead ends: 785 [2022-12-13 15:48:58,530 INFO L226 Difference]: Without dead ends: 751 [2022-12-13 15:48:58,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:48:58,531 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 314 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:58,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 412 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:48:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-12-13 15:48:58,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 644. [2022-12-13 15:48:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 572 states have (on average 1.2867132867132867) internal successors, (736), 586 states have internal predecessors, (736), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2022-12-13 15:48:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 864 transitions. [2022-12-13 15:48:58,605 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 864 transitions. Word has length 55 [2022-12-13 15:48:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:58,605 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 864 transitions. [2022-12-13 15:48:58,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 864 transitions. [2022-12-13 15:48:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 15:48:58,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:58,606 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:58,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:48:58,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 15:48:58,807 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:58,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:58,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1506046358, now seen corresponding path program 1 times [2022-12-13 15:48:58,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:58,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772385676] [2022-12-13 15:48:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:58,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:58,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:59,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:59,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 15:48:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 15:48:59,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:59,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772385676] [2022-12-13 15:48:59,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772385676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:59,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872193220] [2022-12-13 15:48:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:59,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:59,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:59,049 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:59,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:48:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:59,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 15:48:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:48:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 15:48:59,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:48:59,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872193220] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:48:59,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:48:59,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-12-13 15:48:59,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246595167] [2022-12-13 15:48:59,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:48:59,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:48:59,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:48:59,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:48:59,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:48:59,119 INFO L87 Difference]: Start difference. First operand 644 states and 864 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:48:59,171 INFO L93 Difference]: Finished difference Result 958 states and 1299 transitions. [2022-12-13 15:48:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:48:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2022-12-13 15:48:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:48:59,174 INFO L225 Difference]: With dead ends: 958 [2022-12-13 15:48:59,174 INFO L226 Difference]: Without dead ends: 684 [2022-12-13 15:48:59,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:48:59,175 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:48:59,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 371 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:48:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-12-13 15:48:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 664. [2022-12-13 15:48:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 592 states have (on average 1.277027027027027) internal successors, (756), 606 states have internal predecessors, (756), 64 states have call successors, (64), 6 states have call predecessors, (64), 7 states have return successors, (64), 55 states have call predecessors, (64), 61 states have call successors, (64) [2022-12-13 15:48:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 884 transitions. [2022-12-13 15:48:59,223 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 884 transitions. Word has length 57 [2022-12-13 15:48:59,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:48:59,224 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 884 transitions. [2022-12-13 15:48:59,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:48:59,224 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 884 transitions. [2022-12-13 15:48:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 15:48:59,225 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:48:59,225 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:48:59,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 15:48:59,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 15:48:59,426 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:48:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:48:59,426 INFO L85 PathProgramCache]: Analyzing trace with hash 696699732, now seen corresponding path program 1 times [2022-12-13 15:48:59,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:48:59,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503134642] [2022-12-13 15:48:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:59,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:48:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:59,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:48:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:59,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:48:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:59,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 15:48:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:48:59,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:48:59,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503134642] [2022-12-13 15:48:59,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503134642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:48:59,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413878902] [2022-12-13 15:48:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:48:59,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:48:59,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:48:59,870 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:48:59,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:48:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:48:59,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:48:59,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:49:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:49:00,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:49:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:49:02,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413878902] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:49:02,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:49:02,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 21] total 46 [2022-12-13 15:49:02,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562301022] [2022-12-13 15:49:02,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:49:02,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 15:49:02,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:49:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 15:49:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1928, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 15:49:02,413 INFO L87 Difference]: Start difference. First operand 664 states and 884 transitions. Second operand has 46 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 38 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-13 15:49:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:49:06,526 INFO L93 Difference]: Finished difference Result 1216 states and 1636 transitions. [2022-12-13 15:49:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 15:49:06,526 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 38 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2022-12-13 15:49:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:49:06,529 INFO L225 Difference]: With dead ends: 1216 [2022-12-13 15:49:06,529 INFO L226 Difference]: Without dead ends: 1052 [2022-12-13 15:49:06,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=399, Invalid=4293, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 15:49:06,531 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 983 mSDsluCounter, 4470 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 4646 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:49:06,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 4646 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-13 15:49:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-12-13 15:49:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 776. [2022-12-13 15:49:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 692 states have (on average 1.2760115606936415) internal successors, (883), 706 states have internal predecessors, (883), 74 states have call successors, (74), 7 states have call predecessors, (74), 9 states have return successors, (79), 66 states have call predecessors, (79), 71 states have call successors, (79) [2022-12-13 15:49:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1036 transitions. [2022-12-13 15:49:06,617 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1036 transitions. Word has length 57 [2022-12-13 15:49:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:49:06,617 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1036 transitions. [2022-12-13 15:49:06,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 38 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-13 15:49:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1036 transitions. [2022-12-13 15:49:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 15:49:06,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:49:06,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 15:49:06,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:49:06,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 15:49:06,820 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:49:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:06,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1129526808, now seen corresponding path program 1 times [2022-12-13 15:49:06,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:49:06,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770772915] [2022-12-13 15:49:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:49:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:07,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:49:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:07,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 15:49:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:07,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 15:49:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:49:07,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:49:07,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770772915] [2022-12-13 15:49:07,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770772915] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:49:07,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632652913] [2022-12-13 15:49:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:07,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:49:07,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:49:07,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:49:07,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2793b581-d3e8-49c2-a583-77aac94f7834/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:49:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:49:07,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 15:49:07,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:50:28,900 WARN L233 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 15262 DAG size of output: 15261 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)