./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/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_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/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_f329122a-d8dc-4723-adfe-b5d21b5a35b3/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 e7078db7101404701d1361cc736476696e00d8cbe0085be82e13ec1c6956c8c2 --- 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 14:13:34,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:13:34,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:13:34,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:13:34,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:13:34,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:13:34,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:13:34,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:13:34,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:13:34,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:13:34,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:13:34,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:13:34,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:13:34,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:13:34,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:13:34,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:13:34,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:13:34,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:13:34,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:13:34,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:13:34,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:13:34,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:13:34,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:13:34,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:13:34,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:13:34,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:13:34,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:13:34,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:13:34,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:13:34,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:13:34,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:13:34,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:13:34,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:13:34,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:13:34,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:13:34,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:13:34,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:13:34,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:13:34,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:13:34,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:13:34,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:13:34,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:13:34,372 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:13:34,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:13:34,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:13:34,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:13:34,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:13:34,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:13:34,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:13:34,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:13:34,375 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:13:34,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:13:34,375 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:13:34,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:13:34,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:13:34,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:13:34,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:13:34,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:13:34,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:13:34,376 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:13:34,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:13:34,377 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:13:34,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:13:34,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:13:34,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:13:34,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:13:34,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:13:34,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:13:34,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:13:34,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:13:34,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:13:34,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:13:34,379 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:13:34,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:13:34,379 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:13:34,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:13:34,379 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:13:34,379 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_f329122a-d8dc-4723-adfe-b5d21b5a35b3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7078db7101404701d1361cc736476696e00d8cbe0085be82e13ec1c6956c8c2 [2022-12-13 14:13:34,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:13:34,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:13:34,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:13:34,606 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:13:34,606 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:13:34,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2022-12-13 14:13:37,162 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:13:37,297 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:13:37,298 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2022-12-13 14:13:37,304 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/data/9e193af67/578880942e134be9b4f2961d8a272ad6/FLAG6b6fc8ed1 [2022-12-13 14:13:37,314 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/data/9e193af67/578880942e134be9b4f2961d8a272ad6 [2022-12-13 14:13:37,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:13:37,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:13:37,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:13:37,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:13:37,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:13:37,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508cff08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37, skipping insertion in model container [2022-12-13 14:13:37,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:13:37,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:13:37,488 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_f329122a-d8dc-4723-adfe-b5d21b5a35b3/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c[15140,15153] [2022-12-13 14:13:37,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:13:37,499 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:13:37,536 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_f329122a-d8dc-4723-adfe-b5d21b5a35b3/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.UNBOUNDED.pals.c[15140,15153] [2022-12-13 14:13:37,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:13:37,548 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:13:37,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37 WrapperNode [2022-12-13 14:13:37,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:13:37,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:13:37,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:13:37,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:13:37,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,583 INFO L138 Inliner]: procedures = 26, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 367 [2022-12-13 14:13:37,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:13:37,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:13:37,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:13:37,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:13:37,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,603 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:13:37,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:13:37,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:13:37,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:13:37,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (1/1) ... [2022-12-13 14:13:37,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:13:37,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:13:37,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:13:37,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:13:37,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:13:37,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:13:37,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:13:37,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:13:37,745 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:13:37,747 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:13:38,137 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:13:38,142 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:13:38,143 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 14:13:38,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:13:38 BoogieIcfgContainer [2022-12-13 14:13:38,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:13:38,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:13:38,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:13:38,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:13:38,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:13:37" (1/3) ... [2022-12-13 14:13:38,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673613aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:13:38, skipping insertion in model container [2022-12-13 14:13:38,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:13:37" (2/3) ... [2022-12-13 14:13:38,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673613aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:13:38, skipping insertion in model container [2022-12-13 14:13:38,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:13:38" (3/3) ... [2022-12-13 14:13:38,152 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c [2022-12-13 14:13:38,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:13:38,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 14:13:38,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:13:38,212 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;@52b69b0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:13:38,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 14:13:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 98 states have (on average 1.7653061224489797) internal successors, (173), 99 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 14:13:38,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:38,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:38,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:38,226 INFO L85 PathProgramCache]: Analyzing trace with hash -315338523, now seen corresponding path program 1 times [2022-12-13 14:13:38,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:38,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280428285] [2022-12-13 14:13:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:38,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:38,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:38,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280428285] [2022-12-13 14:13:38,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280428285] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:38,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:38,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:13:38,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575786558] [2022-12-13 14:13:38,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:38,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 14:13:38,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:38,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 14:13:38,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:13:38,401 INFO L87 Difference]: Start difference. First operand has 100 states, 98 states have (on average 1.7653061224489797) internal successors, (173), 99 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:38,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:38,420 INFO L93 Difference]: Finished difference Result 151 states and 257 transitions. [2022-12-13 14:13:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 14:13:38,421 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 14:13:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:38,428 INFO L225 Difference]: With dead ends: 151 [2022-12-13 14:13:38,428 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 14:13:38,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:13:38,432 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:38,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:13:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 14:13:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-12-13 14:13:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.7473684210526317) internal successors, (166), 95 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 166 transitions. [2022-12-13 14:13:38,460 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 166 transitions. Word has length 25 [2022-12-13 14:13:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:38,460 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 166 transitions. [2022-12-13 14:13:38,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 166 transitions. [2022-12-13 14:13:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 14:13:38,461 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:38,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:38,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:13:38,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1132986973, now seen corresponding path program 1 times [2022-12-13 14:13:38,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:38,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048222133] [2022-12-13 14:13:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:38,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:38,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:38,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048222133] [2022-12-13 14:13:38,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048222133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:38,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:38,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:13:38,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873887856] [2022-12-13 14:13:38,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:38,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:13:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:38,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:13:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:13:38,620 INFO L87 Difference]: Start difference. First operand 96 states and 166 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:38,699 INFO L93 Difference]: Finished difference Result 150 states and 250 transitions. [2022-12-13 14:13:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:13:38,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 14:13:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:38,700 INFO L225 Difference]: With dead ends: 150 [2022-12-13 14:13:38,700 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 14:13:38,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:13:38,701 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 3 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:38,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 613 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:13:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 14:13:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-12-13 14:13:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 95 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2022-12-13 14:13:38,707 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 25 [2022-12-13 14:13:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:38,707 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2022-12-13 14:13:38,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2022-12-13 14:13:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 14:13:38,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:38,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:38,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:13:38,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:38,709 INFO L85 PathProgramCache]: Analyzing trace with hash 358389460, now seen corresponding path program 1 times [2022-12-13 14:13:38,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:38,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114013090] [2022-12-13 14:13:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:38,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:38,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:38,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114013090] [2022-12-13 14:13:38,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114013090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:38,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:38,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:13:38,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135724526] [2022-12-13 14:13:38,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:38,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:13:38,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:38,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:13:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:13:38,872 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:39,179 INFO L93 Difference]: Finished difference Result 696 states and 1086 transitions. [2022-12-13 14:13:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:13:39,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-12-13 14:13:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:39,184 INFO L225 Difference]: With dead ends: 696 [2022-12-13 14:13:39,184 INFO L226 Difference]: Without dead ends: 646 [2022-12-13 14:13:39,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:13:39,186 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1161 mSDsluCounter, 1783 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:39,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 1903 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:13:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-12-13 14:13:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 144. [2022-12-13 14:13:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4195804195804196) internal successors, (203), 143 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 203 transitions. [2022-12-13 14:13:39,205 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 203 transitions. Word has length 64 [2022-12-13 14:13:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:39,206 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 203 transitions. [2022-12-13 14:13:39,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 203 transitions. [2022-12-13 14:13:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 14:13:39,207 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:39,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:39,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:13:39,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:39,208 INFO L85 PathProgramCache]: Analyzing trace with hash -534313204, now seen corresponding path program 1 times [2022-12-13 14:13:39,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:39,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291269326] [2022-12-13 14:13:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:39,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:39,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:39,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291269326] [2022-12-13 14:13:39,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291269326] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:39,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:39,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:13:39,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215653108] [2022-12-13 14:13:39,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:39,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:13:39,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:39,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:13:39,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:13:39,473 INFO L87 Difference]: Start difference. First operand 144 states and 203 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:39,685 INFO L93 Difference]: Finished difference Result 244 states and 361 transitions. [2022-12-13 14:13:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:13:39,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-13 14:13:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:39,687 INFO L225 Difference]: With dead ends: 244 [2022-12-13 14:13:39,687 INFO L226 Difference]: Without dead ends: 146 [2022-12-13 14:13:39,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:13:39,688 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 264 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:39,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 501 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:13:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-13 14:13:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-12-13 14:13:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4125874125874125) internal successors, (202), 143 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 202 transitions. [2022-12-13 14:13:39,697 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 202 transitions. Word has length 66 [2022-12-13 14:13:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:39,697 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 202 transitions. [2022-12-13 14:13:39,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 202 transitions. [2022-12-13 14:13:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 14:13:39,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:39,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:13:39,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 14:13:39,699 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash -600806716, now seen corresponding path program 1 times [2022-12-13 14:13:39,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:39,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059356297] [2022-12-13 14:13:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:39,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:39,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:39,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059356297] [2022-12-13 14:13:39,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059356297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:39,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:39,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:13:39,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302065103] [2022-12-13 14:13:39,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:39,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:13:39,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:13:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:39,763 INFO L87 Difference]: Start difference. First operand 144 states and 202 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:39,789 INFO L93 Difference]: Finished difference Result 329 states and 495 transitions. [2022-12-13 14:13:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:13:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-13 14:13:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:39,791 INFO L225 Difference]: With dead ends: 329 [2022-12-13 14:13:39,791 INFO L226 Difference]: Without dead ends: 231 [2022-12-13 14:13:39,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:39,792 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 53 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:39,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 195 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:13:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-13 14:13:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2022-12-13 14:13:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.4646017699115044) internal successors, (331), 226 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 331 transitions. [2022-12-13 14:13:39,806 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 331 transitions. Word has length 66 [2022-12-13 14:13:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:39,806 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 331 transitions. [2022-12-13 14:13:39,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 331 transitions. [2022-12-13 14:13:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 14:13:39,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:39,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:39,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:13:39,808 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash 201436865, now seen corresponding path program 1 times [2022-12-13 14:13:39,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:39,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235827837] [2022-12-13 14:13:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:39,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:39,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:39,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235827837] [2022-12-13 14:13:39,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235827837] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:39,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:39,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:13:39,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976760518] [2022-12-13 14:13:39,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:39,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:13:39,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:39,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:13:39,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:13:39,954 INFO L87 Difference]: Start difference. First operand 227 states and 331 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:40,032 INFO L93 Difference]: Finished difference Result 404 states and 605 transitions. [2022-12-13 14:13:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:13:40,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-12-13 14:13:40,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:40,035 INFO L225 Difference]: With dead ends: 404 [2022-12-13 14:13:40,035 INFO L226 Difference]: Without dead ends: 402 [2022-12-13 14:13:40,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:13:40,036 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 211 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:40,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 577 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:13:40,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-12-13 14:13:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 233. [2022-12-13 14:13:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.4482758620689655) internal successors, (336), 232 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 336 transitions. [2022-12-13 14:13:40,061 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 336 transitions. Word has length 67 [2022-12-13 14:13:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:40,061 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 336 transitions. [2022-12-13 14:13:40,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 336 transitions. [2022-12-13 14:13:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 14:13:40,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:40,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:40,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:13:40,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1971945076, now seen corresponding path program 1 times [2022-12-13 14:13:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:40,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571081274] [2022-12-13 14:13:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:40,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:40,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:40,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571081274] [2022-12-13 14:13:40,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571081274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:40,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:40,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:13:40,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86651071] [2022-12-13 14:13:40,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:40,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:13:40,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:40,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:13:40,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:40,127 INFO L87 Difference]: Start difference. First operand 233 states and 336 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:40,169 INFO L93 Difference]: Finished difference Result 591 states and 888 transitions. [2022-12-13 14:13:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:13:40,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-13 14:13:40,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:40,171 INFO L225 Difference]: With dead ends: 591 [2022-12-13 14:13:40,171 INFO L226 Difference]: Without dead ends: 404 [2022-12-13 14:13:40,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:40,172 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 68 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:40,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 268 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:13:40,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-12-13 14:13:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 402. [2022-12-13 14:13:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.4788029925187032) internal successors, (593), 401 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 593 transitions. [2022-12-13 14:13:40,196 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 593 transitions. Word has length 68 [2022-12-13 14:13:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:40,197 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 593 transitions. [2022-12-13 14:13:40,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 593 transitions. [2022-12-13 14:13:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 14:13:40,197 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:40,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:40,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 14:13:40,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:40,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:40,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1708088692, now seen corresponding path program 1 times [2022-12-13 14:13:40,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:40,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495931512] [2022-12-13 14:13:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:40,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:40,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:40,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495931512] [2022-12-13 14:13:40,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495931512] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:40,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:40,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:13:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892005412] [2022-12-13 14:13:40,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:40,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:13:40,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:13:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:40,235 INFO L87 Difference]: Start difference. First operand 402 states and 593 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:40,295 INFO L93 Difference]: Finished difference Result 1082 states and 1631 transitions. [2022-12-13 14:13:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:13:40,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-13 14:13:40,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:40,298 INFO L225 Difference]: With dead ends: 1082 [2022-12-13 14:13:40,298 INFO L226 Difference]: Without dead ends: 726 [2022-12-13 14:13:40,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:40,299 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 66 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:40,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 270 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:13:40,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-12-13 14:13:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 724. [2022-12-13 14:13:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 1.4868603042876902) internal successors, (1075), 723 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1075 transitions. [2022-12-13 14:13:40,350 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1075 transitions. Word has length 68 [2022-12-13 14:13:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:40,350 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 1075 transitions. [2022-12-13 14:13:40,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,350 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1075 transitions. [2022-12-13 14:13:40,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 14:13:40,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:40,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:40,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 14:13:40,351 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:40,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:40,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1609671820, now seen corresponding path program 1 times [2022-12-13 14:13:40,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:40,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576072625] [2022-12-13 14:13:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:40,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:40,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:40,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576072625] [2022-12-13 14:13:40,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576072625] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:40,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:40,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:13:40,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955019893] [2022-12-13 14:13:40,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:40,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:13:40,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:13:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:40,390 INFO L87 Difference]: Start difference. First operand 724 states and 1075 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:40,500 INFO L93 Difference]: Finished difference Result 2016 states and 3021 transitions. [2022-12-13 14:13:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:13:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-13 14:13:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:40,503 INFO L225 Difference]: With dead ends: 2016 [2022-12-13 14:13:40,503 INFO L226 Difference]: Without dead ends: 1338 [2022-12-13 14:13:40,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:40,505 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 62 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:40,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 266 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:13:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-12-13 14:13:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1336. [2022-12-13 14:13:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 1.4794007490636705) internal successors, (1975), 1335 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 1975 transitions. [2022-12-13 14:13:40,588 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 1975 transitions. Word has length 68 [2022-12-13 14:13:40,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:40,588 INFO L495 AbstractCegarLoop]: Abstraction has 1336 states and 1975 transitions. [2022-12-13 14:13:40,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 1975 transitions. [2022-12-13 14:13:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 14:13:40,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:40,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:40,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 14:13:40,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:40,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:40,590 INFO L85 PathProgramCache]: Analyzing trace with hash -904362612, now seen corresponding path program 1 times [2022-12-13 14:13:40,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:40,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632125951] [2022-12-13 14:13:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:40,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:40,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632125951] [2022-12-13 14:13:40,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632125951] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:40,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:40,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:13:40,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747565381] [2022-12-13 14:13:40,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:40,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:13:40,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:13:40,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:40,647 INFO L87 Difference]: Start difference. First operand 1336 states and 1975 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:40,845 INFO L93 Difference]: Finished difference Result 3788 states and 5609 transitions. [2022-12-13 14:13:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:13:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-13 14:13:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:40,851 INFO L225 Difference]: With dead ends: 3788 [2022-12-13 14:13:40,851 INFO L226 Difference]: Without dead ends: 2498 [2022-12-13 14:13:40,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:40,852 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 60 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:40,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 268 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:13:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2022-12-13 14:13:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2496. [2022-12-13 14:13:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 1.4617234468937876) internal successors, (3647), 2495 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3647 transitions. [2022-12-13 14:13:41,048 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3647 transitions. Word has length 68 [2022-12-13 14:13:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:41,048 INFO L495 AbstractCegarLoop]: Abstraction has 2496 states and 3647 transitions. [2022-12-13 14:13:41,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3647 transitions. [2022-12-13 14:13:41,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 14:13:41,049 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:41,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:41,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 14:13:41,049 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:41,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:41,049 INFO L85 PathProgramCache]: Analyzing trace with hash -469826676, now seen corresponding path program 1 times [2022-12-13 14:13:41,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:41,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258530668] [2022-12-13 14:13:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:41,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:41,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:41,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258530668] [2022-12-13 14:13:41,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258530668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:41,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:41,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:13:41,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499801058] [2022-12-13 14:13:41,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:41,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:13:41,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:13:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:41,083 INFO L87 Difference]: Start difference. First operand 2496 states and 3647 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:41,417 INFO L93 Difference]: Finished difference Result 7140 states and 10401 transitions. [2022-12-13 14:13:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:13:41,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-13 14:13:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:41,427 INFO L225 Difference]: With dead ends: 7140 [2022-12-13 14:13:41,427 INFO L226 Difference]: Without dead ends: 4690 [2022-12-13 14:13:41,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:41,430 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 64 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:41,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 272 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:13:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2022-12-13 14:13:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 4688. [2022-12-13 14:13:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 1.4369532750160017) internal successors, (6735), 4687 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 6735 transitions. [2022-12-13 14:13:41,769 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 6735 transitions. Word has length 68 [2022-12-13 14:13:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:41,769 INFO L495 AbstractCegarLoop]: Abstraction has 4688 states and 6735 transitions. [2022-12-13 14:13:41,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 6735 transitions. [2022-12-13 14:13:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-13 14:13:41,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:41,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:41,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 14:13:41,770 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:41,770 INFO L85 PathProgramCache]: Analyzing trace with hash -697172697, now seen corresponding path program 1 times [2022-12-13 14:13:41,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:41,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073709662] [2022-12-13 14:13:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:41,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:41,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:41,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073709662] [2022-12-13 14:13:41,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073709662] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:41,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:41,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:13:41,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554847825] [2022-12-13 14:13:41,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:41,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:13:41,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:41,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:13:41,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:41,804 INFO L87 Difference]: Start difference. First operand 4688 states and 6735 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:42,297 INFO L93 Difference]: Finished difference Result 9559 states and 13845 transitions. [2022-12-13 14:13:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:13:42,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-12-13 14:13:42,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:42,320 INFO L225 Difference]: With dead ends: 9559 [2022-12-13 14:13:42,320 INFO L226 Difference]: Without dead ends: 6932 [2022-12-13 14:13:42,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:13:42,324 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 67 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:42,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 269 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:13:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2022-12-13 14:13:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6930. [2022-12-13 14:13:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 1.4294992062346659) internal successors, (9905), 6929 states have internal predecessors, (9905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 9905 transitions. [2022-12-13 14:13:43,040 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 9905 transitions. Word has length 70 [2022-12-13 14:13:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:43,040 INFO L495 AbstractCegarLoop]: Abstraction has 6930 states and 9905 transitions. [2022-12-13 14:13:43,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 9905 transitions. [2022-12-13 14:13:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-13 14:13:43,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:43,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:43,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 14:13:43,044 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:43,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1093136202, now seen corresponding path program 1 times [2022-12-13 14:13:43,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:43,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315323340] [2022-12-13 14:13:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:43,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:13:43,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:43,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315323340] [2022-12-13 14:13:43,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315323340] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:43,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:43,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:13:43,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723250288] [2022-12-13 14:13:43,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:13:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:13:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:13:43,188 INFO L87 Difference]: Start difference. First operand 6930 states and 9905 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:46,408 INFO L93 Difference]: Finished difference Result 49664 states and 71032 transitions. [2022-12-13 14:13:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:13:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-12-13 14:13:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:46,488 INFO L225 Difference]: With dead ends: 49664 [2022-12-13 14:13:46,488 INFO L226 Difference]: Without dead ends: 42782 [2022-12-13 14:13:46,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:13:46,499 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 924 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:46,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 1057 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:13:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42782 states. [2022-12-13 14:13:47,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42782 to 13810. [2022-12-13 14:13:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13810 states, 13809 states have (on average 1.4240712578752988) internal successors, (19665), 13809 states have internal predecessors, (19665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13810 states to 13810 states and 19665 transitions. [2022-12-13 14:13:47,977 INFO L78 Accepts]: Start accepts. Automaton has 13810 states and 19665 transitions. Word has length 89 [2022-12-13 14:13:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:47,977 INFO L495 AbstractCegarLoop]: Abstraction has 13810 states and 19665 transitions. [2022-12-13 14:13:47,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 13810 states and 19665 transitions. [2022-12-13 14:13:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-13 14:13:47,979 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:47,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:47,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 14:13:47,979 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1356992586, now seen corresponding path program 1 times [2022-12-13 14:13:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:47,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245078587] [2022-12-13 14:13:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:47,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:13:48,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:48,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245078587] [2022-12-13 14:13:48,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245078587] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:48,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:48,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:13:48,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210450721] [2022-12-13 14:13:48,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:48,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:13:48,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:13:48,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:13:48,096 INFO L87 Difference]: Start difference. First operand 13810 states and 19665 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:13:52,500 INFO L93 Difference]: Finished difference Result 56544 states and 80792 transitions. [2022-12-13 14:13:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:13:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-12-13 14:13:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:13:52,579 INFO L225 Difference]: With dead ends: 56544 [2022-12-13 14:13:52,580 INFO L226 Difference]: Without dead ends: 49662 [2022-12-13 14:13:52,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:13:52,597 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 966 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:13:52,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 974 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:13:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49662 states. [2022-12-13 14:13:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49662 to 24146. [2022-12-13 14:13:55,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24146 states, 24145 states have (on average 1.417477738662249) internal successors, (34225), 24145 states have internal predecessors, (34225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24146 states to 24146 states and 34225 transitions. [2022-12-13 14:13:55,309 INFO L78 Accepts]: Start accepts. Automaton has 24146 states and 34225 transitions. Word has length 89 [2022-12-13 14:13:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:13:55,309 INFO L495 AbstractCegarLoop]: Abstraction has 24146 states and 34225 transitions. [2022-12-13 14:13:55,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:13:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 24146 states and 34225 transitions. [2022-12-13 14:13:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-13 14:13:55,312 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:13:55,312 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:55,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 14:13:55,313 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:13:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:55,313 INFO L85 PathProgramCache]: Analyzing trace with hash 379785802, now seen corresponding path program 1 times [2022-12-13 14:13:55,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:55,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888957734] [2022-12-13 14:13:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:55,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 14:13:55,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:55,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888957734] [2022-12-13 14:13:55,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888957734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:13:55,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:13:55,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:13:55,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154898676] [2022-12-13 14:13:55,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:13:55,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:13:55,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:55,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:13:55,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:13:55,424 INFO L87 Difference]: Start difference. First operand 24146 states and 34225 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:01,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:01,146 INFO L93 Difference]: Finished difference Result 63424 states and 90552 transitions. [2022-12-13 14:14:01,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:14:01,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-12-13 14:14:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:01,215 INFO L225 Difference]: With dead ends: 63424 [2022-12-13 14:14:01,215 INFO L226 Difference]: Without dead ends: 56542 [2022-12-13 14:14:01,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:14:01,227 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 1039 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:01,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 985 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:14:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56542 states. [2022-12-13 14:14:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56542 to 31026. [2022-12-13 14:14:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31026 states, 31025 states have (on average 1.4177276390008058) internal successors, (43985), 31025 states have internal predecessors, (43985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31026 states to 31026 states and 43985 transitions. [2022-12-13 14:14:04,562 INFO L78 Accepts]: Start accepts. Automaton has 31026 states and 43985 transitions. Word has length 89 [2022-12-13 14:14:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:04,562 INFO L495 AbstractCegarLoop]: Abstraction has 31026 states and 43985 transitions. [2022-12-13 14:14:04,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 31026 states and 43985 transitions. [2022-12-13 14:14:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-13 14:14:04,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:04,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:04,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 14:14:04,565 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:04,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2134248630, now seen corresponding path program 1 times [2022-12-13 14:14:04,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:04,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285556551] [2022-12-13 14:14:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:04,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 14:14:04,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:04,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285556551] [2022-12-13 14:14:04,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285556551] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:04,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:14:04,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:14:04,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223540460] [2022-12-13 14:14:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:04,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:14:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:14:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:14:04,669 INFO L87 Difference]: Start difference. First operand 31026 states and 43985 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:12,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:12,532 INFO L93 Difference]: Finished difference Result 70304 states and 100312 transitions. [2022-12-13 14:14:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:14:12,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-12-13 14:14:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:12,604 INFO L225 Difference]: With dead ends: 70304 [2022-12-13 14:14:12,604 INFO L226 Difference]: Without dead ends: 63422 [2022-12-13 14:14:12,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:14:12,618 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 955 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:12,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 992 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:14:12,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63422 states. [2022-12-13 14:14:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63422 to 37906. [2022-12-13 14:14:17,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37906 states, 37905 states have (on average 1.4178868223189554) internal successors, (53745), 37905 states have internal predecessors, (53745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37906 states to 37906 states and 53745 transitions. [2022-12-13 14:14:17,069 INFO L78 Accepts]: Start accepts. Automaton has 37906 states and 53745 transitions. Word has length 89 [2022-12-13 14:14:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:17,069 INFO L495 AbstractCegarLoop]: Abstraction has 37906 states and 53745 transitions. [2022-12-13 14:14:17,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 37906 states and 53745 transitions. [2022-12-13 14:14:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-13 14:14:17,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:17,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:17,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 14:14:17,072 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:17,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1699712694, now seen corresponding path program 1 times [2022-12-13 14:14:17,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:17,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752233568] [2022-12-13 14:14:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:17,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 14:14:17,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:17,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752233568] [2022-12-13 14:14:17,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752233568] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:17,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:14:17,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:14:17,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679750298] [2022-12-13 14:14:17,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:17,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:14:17,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:14:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:14:17,181 INFO L87 Difference]: Start difference. First operand 37906 states and 53745 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:24,932 INFO L93 Difference]: Finished difference Result 77184 states and 110072 transitions. [2022-12-13 14:14:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:14:24,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-12-13 14:14:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:25,017 INFO L225 Difference]: With dead ends: 77184 [2022-12-13 14:14:25,017 INFO L226 Difference]: Without dead ends: 70302 [2022-12-13 14:14:25,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:14:25,032 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 865 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:25,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 1115 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:14:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70302 states. [2022-12-13 14:14:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70302 to 44786. [2022-12-13 14:14:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44786 states, 44785 states have (on average 1.4179970972423803) internal successors, (63505), 44785 states have internal predecessors, (63505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44786 states to 44786 states and 63505 transitions. [2022-12-13 14:14:30,552 INFO L78 Accepts]: Start accepts. Automaton has 44786 states and 63505 transitions. Word has length 89 [2022-12-13 14:14:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:30,552 INFO L495 AbstractCegarLoop]: Abstraction has 44786 states and 63505 transitions. [2022-12-13 14:14:30,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 44786 states and 63505 transitions. [2022-12-13 14:14:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-13 14:14:30,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:30,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:30,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 14:14:30,556 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1182669314, now seen corresponding path program 1 times [2022-12-13 14:14:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:30,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445745947] [2022-12-13 14:14:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:30,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:30,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:30,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445745947] [2022-12-13 14:14:30,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445745947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:30,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:14:30,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:14:30,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791955436] [2022-12-13 14:14:30,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:30,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:14:30,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:30,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:14:30,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:30,622 INFO L87 Difference]: Start difference. First operand 44786 states and 63505 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:34,197 INFO L93 Difference]: Finished difference Result 76428 states and 108874 transitions. [2022-12-13 14:14:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:14:34,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-12-13 14:14:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:34,240 INFO L225 Difference]: With dead ends: 76428 [2022-12-13 14:14:34,240 INFO L226 Difference]: Without dead ends: 31690 [2022-12-13 14:14:34,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:34,270 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 58 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 285 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 14:14:34,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 285 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31690 states. [2022-12-13 14:14:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31690 to 31688. [2022-12-13 14:14:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31688 states, 31687 states have (on average 1.4201091930444663) internal successors, (44999), 31687 states have internal predecessors, (44999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31688 states to 31688 states and 44999 transitions. [2022-12-13 14:14:37,944 INFO L78 Accepts]: Start accepts. Automaton has 31688 states and 44999 transitions. Word has length 91 [2022-12-13 14:14:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:37,945 INFO L495 AbstractCegarLoop]: Abstraction has 31688 states and 44999 transitions. [2022-12-13 14:14:37,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 31688 states and 44999 transitions. [2022-12-13 14:14:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-13 14:14:37,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:37,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:37,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 14:14:37,947 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:37,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1501629595, now seen corresponding path program 1 times [2022-12-13 14:14:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:37,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752450614] [2022-12-13 14:14:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:14:38,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752450614] [2022-12-13 14:14:38,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752450614] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:38,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:14:38,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:14:38,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736573426] [2022-12-13 14:14:38,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:38,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:14:38,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:38,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:14:38,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:14:38,057 INFO L87 Difference]: Start difference. First operand 31688 states and 44999 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:45,201 INFO L93 Difference]: Finished difference Result 60886 states and 86862 transitions. [2022-12-13 14:14:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:14:45,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-12-13 14:14:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:45,265 INFO L225 Difference]: With dead ends: 60886 [2022-12-13 14:14:45,266 INFO L226 Difference]: Without dead ends: 56020 [2022-12-13 14:14:45,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:14:45,276 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 930 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:45,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1213 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:14:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56020 states. [2022-12-13 14:14:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56020 to 36552. [2022-12-13 14:14:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36552 states, 36551 states have (on average 1.4202347404995759) internal successors, (51911), 36551 states have internal predecessors, (51911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36552 states to 36552 states and 51911 transitions. [2022-12-13 14:14:50,040 INFO L78 Accepts]: Start accepts. Automaton has 36552 states and 51911 transitions. Word has length 91 [2022-12-13 14:14:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:50,040 INFO L495 AbstractCegarLoop]: Abstraction has 36552 states and 51911 transitions. [2022-12-13 14:14:50,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 36552 states and 51911 transitions. [2022-12-13 14:14:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-13 14:14:50,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:50,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:50,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 14:14:50,043 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1061565063, now seen corresponding path program 1 times [2022-12-13 14:14:50,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:50,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207695812] [2022-12-13 14:14:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:50,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:50,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:50,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207695812] [2022-12-13 14:14:50,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207695812] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:50,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:14:50,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:14:50,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345252973] [2022-12-13 14:14:50,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:50,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:14:50,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:50,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:14:50,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:50,105 INFO L87 Difference]: Start difference. First operand 36552 states and 51911 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:52,447 INFO L93 Difference]: Finished difference Result 54796 states and 77833 transitions. [2022-12-13 14:14:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:14:52,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-12-13 14:14:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:52,464 INFO L225 Difference]: With dead ends: 54796 [2022-12-13 14:14:52,465 INFO L226 Difference]: Without dead ends: 18314 [2022-12-13 14:14:52,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:52,484 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 53 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 270 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 14:14:52,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 270 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18314 states. [2022-12-13 14:14:54,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18314 to 18312. [2022-12-13 14:14:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18312 states, 18311 states have (on average 1.4063131451040358) internal successors, (25751), 18311 states have internal predecessors, (25751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18312 states to 18312 states and 25751 transitions. [2022-12-13 14:14:54,810 INFO L78 Accepts]: Start accepts. Automaton has 18312 states and 25751 transitions. Word has length 92 [2022-12-13 14:14:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:54,810 INFO L495 AbstractCegarLoop]: Abstraction has 18312 states and 25751 transitions. [2022-12-13 14:14:54,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 18312 states and 25751 transitions. [2022-12-13 14:14:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-13 14:14:54,812 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:54,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:54,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 14:14:54,812 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:54,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1358904597, now seen corresponding path program 1 times [2022-12-13 14:14:54,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:54,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987590431] [2022-12-13 14:14:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:54,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:54,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:54,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987590431] [2022-12-13 14:14:54,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987590431] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:54,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:14:54,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:14:54,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909523103] [2022-12-13 14:14:54,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:54,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:14:54,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:14:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:54,894 INFO L87 Difference]: Start difference. First operand 18312 states and 25751 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:56,065 INFO L93 Difference]: Finished difference Result 27436 states and 38593 transitions. [2022-12-13 14:14:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:14:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-12-13 14:14:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:56,073 INFO L225 Difference]: With dead ends: 27436 [2022-12-13 14:14:56,073 INFO L226 Difference]: Without dead ends: 9194 [2022-12-13 14:14:56,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:56,081 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 50 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 255 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 14:14:56,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 255 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9194 states. [2022-12-13 14:14:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9194 to 9192. [2022-12-13 14:14:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9192 states, 9191 states have (on average 1.3916875204003918) internal successors, (12791), 9191 states have internal predecessors, (12791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9192 states to 9192 states and 12791 transitions. [2022-12-13 14:14:57,236 INFO L78 Accepts]: Start accepts. Automaton has 9192 states and 12791 transitions. Word has length 94 [2022-12-13 14:14:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:57,236 INFO L495 AbstractCegarLoop]: Abstraction has 9192 states and 12791 transitions. [2022-12-13 14:14:57,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 9192 states and 12791 transitions. [2022-12-13 14:14:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-13 14:14:57,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:57,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:57,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 14:14:57,237 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:57,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1035230941, now seen corresponding path program 1 times [2022-12-13 14:14:57,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:57,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783377081] [2022-12-13 14:14:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:57,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:57,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:57,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783377081] [2022-12-13 14:14:57,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783377081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:57,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:14:57,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:14:57,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179704275] [2022-12-13 14:14:57,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:57,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:14:57,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:14:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:57,295 INFO L87 Difference]: Start difference. First operand 9192 states and 12791 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:57,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:57,888 INFO L93 Difference]: Finished difference Result 13756 states and 19153 transitions. [2022-12-13 14:14:57,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:14:57,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-12-13 14:14:57,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:57,892 INFO L225 Difference]: With dead ends: 13756 [2022-12-13 14:14:57,892 INFO L226 Difference]: Without dead ends: 4634 [2022-12-13 14:14:57,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:57,896 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 47 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 240 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 14:14:57,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 240 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2022-12-13 14:14:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4632. [2022-12-13 14:14:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 1.3757287842798531) internal successors, (6371), 4631 states have internal predecessors, (6371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 6371 transitions. [2022-12-13 14:14:58,473 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 6371 transitions. Word has length 96 [2022-12-13 14:14:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:58,473 INFO L495 AbstractCegarLoop]: Abstraction has 4632 states and 6371 transitions. [2022-12-13 14:14:58,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 6371 transitions. [2022-12-13 14:14:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-13 14:14:58,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:58,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:58,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 14:14:58,474 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:58,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1914159439, now seen corresponding path program 1 times [2022-12-13 14:14:58,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:58,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801708779] [2022-12-13 14:14:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:58,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:58,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:58,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801708779] [2022-12-13 14:14:58,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801708779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:58,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:14:58,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:14:58,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919560585] [2022-12-13 14:14:58,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:58,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:14:58,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:58,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:14:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:58,528 INFO L87 Difference]: Start difference. First operand 4632 states and 6371 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:58,852 INFO L93 Difference]: Finished difference Result 6916 states and 9523 transitions. [2022-12-13 14:14:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:14:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-12-13 14:14:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:58,854 INFO L225 Difference]: With dead ends: 6916 [2022-12-13 14:14:58,854 INFO L226 Difference]: Without dead ends: 2354 [2022-12-13 14:14:58,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:58,857 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 225 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 14:14:58,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 225 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2022-12-13 14:14:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2352. [2022-12-13 14:14:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 1.3572947681837515) internal successors, (3191), 2351 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 3191 transitions. [2022-12-13 14:14:59,157 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 3191 transitions. Word has length 98 [2022-12-13 14:14:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:59,157 INFO L495 AbstractCegarLoop]: Abstraction has 2352 states and 3191 transitions. [2022-12-13 14:14:59,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 3191 transitions. [2022-12-13 14:14:59,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-13 14:14:59,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:59,158 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:59,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 14:14:59,158 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:59,158 INFO L85 PathProgramCache]: Analyzing trace with hash -489289151, now seen corresponding path program 1 times [2022-12-13 14:14:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:59,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023713397] [2022-12-13 14:14:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:59,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:59,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:59,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023713397] [2022-12-13 14:14:59,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023713397] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:59,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:14:59,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:14:59,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796323820] [2022-12-13 14:14:59,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:59,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:14:59,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:14:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:59,209 INFO L87 Difference]: Start difference. First operand 2352 states and 3191 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:59,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:59,392 INFO L93 Difference]: Finished difference Result 3496 states and 4753 transitions. [2022-12-13 14:14:59,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:14:59,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-12-13 14:14:59,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:59,393 INFO L225 Difference]: With dead ends: 3496 [2022-12-13 14:14:59,393 INFO L226 Difference]: Without dead ends: 1214 [2022-12-13 14:14:59,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:14:59,395 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 41 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 210 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 14:14:59,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 210 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-12-13 14:14:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1212. [2022-12-13 14:14:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.3344343517753923) internal successors, (1616), 1211 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1616 transitions. [2022-12-13 14:14:59,543 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1616 transitions. Word has length 100 [2022-12-13 14:14:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:59,543 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 1616 transitions. [2022-12-13 14:14:59,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:14:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1616 transitions. [2022-12-13 14:14:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-13 14:14:59,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:59,543 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:59,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 14:14:59,544 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:59,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1442686541, now seen corresponding path program 1 times [2022-12-13 14:14:59,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:59,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601469] [2022-12-13 14:14:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:59,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:15:00,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:15:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601469] [2022-12-13 14:15:00,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601469] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:15:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391714725] [2022-12-13 14:15:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:15:00,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:15:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:15:00,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:15:00,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:15:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:15:00,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:15:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:15:00,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:15:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:15:01,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391714725] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:15:01,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:15:01,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 27 [2022-12-13 14:15:01,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422510964] [2022-12-13 14:15:01,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:15:01,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:15:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:15:01,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:15:01,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:15:01,741 INFO L87 Difference]: Start difference. First operand 1212 states and 1616 transitions. Second operand has 28 states, 28 states have (on average 9.178571428571429) internal successors, (257), 27 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:15:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:15:04,873 INFO L93 Difference]: Finished difference Result 9207 states and 12266 transitions. [2022-12-13 14:15:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 14:15:04,874 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 9.178571428571429) internal successors, (257), 27 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-12-13 14:15:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:15:04,880 INFO L225 Difference]: With dead ends: 9207 [2022-12-13 14:15:04,880 INFO L226 Difference]: Without dead ends: 8065 [2022-12-13 14:15:04,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 14:15:04,883 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 3962 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3962 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:15:04,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3962 Valid, 1201 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 14:15:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-12-13 14:15:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 4932. [2022-12-13 14:15:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4932 states, 4931 states have (on average 1.340701683228554) internal successors, (6611), 4931 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:15:05,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4932 states to 4932 states and 6611 transitions. [2022-12-13 14:15:05,656 INFO L78 Accepts]: Start accepts. Automaton has 4932 states and 6611 transitions. Word has length 102 [2022-12-13 14:15:05,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:15:05,656 INFO L495 AbstractCegarLoop]: Abstraction has 4932 states and 6611 transitions. [2022-12-13 14:15:05,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.178571428571429) internal successors, (257), 27 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:15:05,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4932 states and 6611 transitions. [2022-12-13 14:15:05,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-13 14:15:05,657 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:15:05,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:15:05,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:15:05,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 14:15:05,859 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:15:05,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:15:05,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1939427683, now seen corresponding path program 1 times [2022-12-13 14:15:05,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:15:05,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843061794] [2022-12-13 14:15:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:15:05,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:15:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:15:06,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:15:06,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843061794] [2022-12-13 14:15:06,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843061794] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:15:06,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662359330] [2022-12-13 14:15:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:15:06,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:15:06,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:15:06,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:15:06,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:15:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:06,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:15:06,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:15:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:15:07,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:15:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:15:07,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662359330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:15:07,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:15:07,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 17 [2022-12-13 14:15:07,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539701896] [2022-12-13 14:15:07,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:15:07,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 14:15:07,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:15:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:15:07,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:15:07,282 INFO L87 Difference]: Start difference. First operand 4932 states and 6611 transitions. Second operand has 17 states, 17 states have (on average 17.235294117647058) internal successors, (293), 17 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:15:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:15:21,240 INFO L93 Difference]: Finished difference Result 48833 states and 64708 transitions. [2022-12-13 14:15:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 14:15:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 17.235294117647058) internal successors, (293), 17 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-12-13 14:15:21,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:15:21,283 INFO L225 Difference]: With dead ends: 48833 [2022-12-13 14:15:21,283 INFO L226 Difference]: Without dead ends: 43971 [2022-12-13 14:15:21,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=886, Invalid=3274, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 14:15:21,293 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 3563 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3563 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:15:21,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3563 Valid, 975 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 14:15:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43971 states. [2022-12-13 14:15:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43971 to 30458. [2022-12-13 14:15:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30458 states, 30457 states have (on average 1.2757001674491906) internal successors, (38854), 30457 states have internal predecessors, (38854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:15:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30458 states to 30458 states and 38854 transitions. [2022-12-13 14:15:27,491 INFO L78 Accepts]: Start accepts. Automaton has 30458 states and 38854 transitions. Word has length 103 [2022-12-13 14:15:27,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:15:27,491 INFO L495 AbstractCegarLoop]: Abstraction has 30458 states and 38854 transitions. [2022-12-13 14:15:27,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 17.235294117647058) internal successors, (293), 17 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:15:27,491 INFO L276 IsEmpty]: Start isEmpty. Operand 30458 states and 38854 transitions. [2022-12-13 14:15:27,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-13 14:15:27,492 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:15:27,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:15:27,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:15:27,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 14:15:27,694 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:15:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:15:27,696 INFO L85 PathProgramCache]: Analyzing trace with hash 423185109, now seen corresponding path program 1 times [2022-12-13 14:15:27,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:15:27,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70165115] [2022-12-13 14:15:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:15:27,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:15:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:15:28,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:15:28,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70165115] [2022-12-13 14:15:28,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70165115] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:15:28,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647705295] [2022-12-13 14:15:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:15:28,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:15:28,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:15:28,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:15:28,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:15:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:28,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 14:15:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:15:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:15:29,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:15:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:15:30,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647705295] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:15:30,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:15:30,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-12-13 14:15:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381302525] [2022-12-13 14:15:30,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:15:30,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 14:15:30,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:15:30,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 14:15:30,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 14:15:30,877 INFO L87 Difference]: Start difference. First operand 30458 states and 38854 transitions. Second operand has 33 states, 33 states have (on average 8.242424242424242) internal successors, (272), 33 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:16:14,515 INFO L93 Difference]: Finished difference Result 171431 states and 218751 transitions. [2022-12-13 14:16:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 14:16:14,516 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 8.242424242424242) internal successors, (272), 33 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-12-13 14:16:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:16:14,685 INFO L225 Difference]: With dead ends: 171431 [2022-12-13 14:16:14,685 INFO L226 Difference]: Without dead ends: 144189 [2022-12-13 14:16:14,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1824, Invalid=7878, Unknown=0, NotChecked=0, Total=9702 [2022-12-13 14:16:14,717 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 4484 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4484 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-13 14:16:14,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4484 Valid, 2315 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2122 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-13 14:16:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144189 states. [2022-12-13 14:16:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144189 to 79715. [2022-12-13 14:16:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79715 states, 79714 states have (on average 1.2734275033243847) internal successors, (101510), 79714 states have internal predecessors, (101510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:34,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79715 states to 79715 states and 101510 transitions. [2022-12-13 14:16:34,508 INFO L78 Accepts]: Start accepts. Automaton has 79715 states and 101510 transitions. Word has length 103 [2022-12-13 14:16:34,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:16:34,509 INFO L495 AbstractCegarLoop]: Abstraction has 79715 states and 101510 transitions. [2022-12-13 14:16:34,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.242424242424242) internal successors, (272), 33 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand 79715 states and 101510 transitions. [2022-12-13 14:16:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-13 14:16:34,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:16:34,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:34,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:16:34,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 14:16:34,712 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:16:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:34,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1343440939, now seen corresponding path program 1 times [2022-12-13 14:16:34,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:34,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144749243] [2022-12-13 14:16:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:34,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:34,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:34,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144749243] [2022-12-13 14:16:34,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144749243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:16:34,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423897244] [2022-12-13 14:16:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:34,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:16:34,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:16:34,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:16:34,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:16:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:35,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 14:16:35,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:16:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:35,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:16:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:36,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423897244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:16:36,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:16:36,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-13 14:16:36,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896845949] [2022-12-13 14:16:36,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:16:36,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 14:16:36,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:36,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 14:16:36,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-12-13 14:16:36,456 INFO L87 Difference]: Start difference. First operand 79715 states and 101510 transitions. Second operand has 25 states, 25 states have (on average 11.12) internal successors, (278), 24 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:17:15,572 INFO L93 Difference]: Finished difference Result 211163 states and 269177 transitions. [2022-12-13 14:17:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 14:17:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 11.12) internal successors, (278), 24 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-12-13 14:17:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:17:15,751 INFO L225 Difference]: With dead ends: 211163 [2022-12-13 14:17:15,751 INFO L226 Difference]: Without dead ends: 135087 [2022-12-13 14:17:15,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=813, Invalid=3219, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 14:17:15,795 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 2841 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2841 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:17:15,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2841 Valid, 1955 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 14:17:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135087 states. [2022-12-13 14:17:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135087 to 77935. [2022-12-13 14:17:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77935 states, 77934 states have (on average 1.2504555136397464) internal successors, (97453), 77934 states have internal predecessors, (97453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77935 states to 77935 states and 97453 transitions. [2022-12-13 14:17:37,338 INFO L78 Accepts]: Start accepts. Automaton has 77935 states and 97453 transitions. Word has length 103 [2022-12-13 14:17:37,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:17:37,339 INFO L495 AbstractCegarLoop]: Abstraction has 77935 states and 97453 transitions. [2022-12-13 14:17:37,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.12) internal successors, (278), 24 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:17:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 77935 states and 97453 transitions. [2022-12-13 14:17:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-13 14:17:37,340 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:17:37,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:37,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 14:17:37,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 14:17:37,542 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:17:37,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1260251937, now seen corresponding path program 1 times [2022-12-13 14:17:37,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:17:37,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869153929] [2022-12-13 14:17:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:37,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:17:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:37,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:17:37,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869153929] [2022-12-13 14:17:37,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869153929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:17:37,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343930224] [2022-12-13 14:17:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:37,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:17:37,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:17:37,910 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:17:37,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:17:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 14:17:37,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:38,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:17:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:39,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343930224] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:17:39,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:17:39,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 14:17:39,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843802297] [2022-12-13 14:17:39,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:17:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:17:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:17:39,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:17:39,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:17:39,618 INFO L87 Difference]: Start difference. First operand 77935 states and 97453 transitions. Second operand has 21 states, 21 states have (on average 11.80952380952381) internal successors, (248), 20 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:18:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:18:43,002 INFO L93 Difference]: Finished difference Result 261526 states and 321645 transitions. [2022-12-13 14:18:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 14:18:43,003 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 11.80952380952381) internal successors, (248), 20 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-12-13 14:18:43,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:18:43,250 INFO L225 Difference]: With dead ends: 261526 [2022-12-13 14:18:43,250 INFO L226 Difference]: Without dead ends: 195561 [2022-12-13 14:18:43,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2022-12-13 14:18:43,300 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 1273 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 14:18:43,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 735 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 14:18:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195561 states. [2022-12-13 14:19:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195561 to 155913. [2022-12-13 14:19:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155913 states, 155912 states have (on average 1.2387757196367182) internal successors, (193140), 155912 states have internal predecessors, (193140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:19:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155913 states to 155913 states and 193140 transitions. [2022-12-13 14:19:29,960 INFO L78 Accepts]: Start accepts. Automaton has 155913 states and 193140 transitions. Word has length 105 [2022-12-13 14:19:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:19:29,961 INFO L495 AbstractCegarLoop]: Abstraction has 155913 states and 193140 transitions. [2022-12-13 14:19:29,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.80952380952381) internal successors, (248), 20 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:19:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 155913 states and 193140 transitions. [2022-12-13 14:19:29,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 14:19:29,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:19:29,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:19:29,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:19:30,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 14:19:30,166 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:19:30,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:19:30,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1153563413, now seen corresponding path program 1 times [2022-12-13 14:19:30,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:19:30,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537243039] [2022-12-13 14:19:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:19:30,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:19:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:19:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:19:30,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:19:30,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537243039] [2022-12-13 14:19:30,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537243039] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:19:30,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471077274] [2022-12-13 14:19:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:19:30,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:19:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:19:30,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:19:30,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:19:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:19:30,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:19:30,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:19:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:19:31,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:19:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:19:32,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471077274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:19:32,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:19:32,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2022-12-13 14:19:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643483630] [2022-12-13 14:19:32,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:19:32,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 14:19:32,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:19:32,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 14:19:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-12-13 14:19:32,489 INFO L87 Difference]: Start difference. First operand 155913 states and 193140 transitions. Second operand has 32 states, 32 states have (on average 8.65625) internal successors, (277), 32 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:23:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:23:07,512 INFO L93 Difference]: Finished difference Result 715626 states and 892346 transitions. [2022-12-13 14:23:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-12-13 14:23:07,513 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 8.65625) internal successors, (277), 32 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-12-13 14:23:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:23:08,436 INFO L225 Difference]: With dead ends: 715626 [2022-12-13 14:23:08,436 INFO L226 Difference]: Without dead ends: 575098 [2022-12-13 14:23:08,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11323 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=4493, Invalid=24919, Unknown=0, NotChecked=0, Total=29412 [2022-12-13 14:23:08,595 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 8355 mSDsluCounter, 4313 mSDsCounter, 0 mSdLazyCounter, 3769 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8355 SdHoareTripleChecker+Valid, 4634 SdHoareTripleChecker+Invalid, 3878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:23:08,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8355 Valid, 4634 Invalid, 3878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3769 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-13 14:23:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575098 states. [2022-12-13 14:24:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575098 to 142484. [2022-12-13 14:24:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142484 states, 142483 states have (on average 1.2277675231431118) internal successors, (174936), 142483 states have internal predecessors, (174936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142484 states to 142484 states and 174936 transitions. [2022-12-13 14:24:05,849 INFO L78 Accepts]: Start accepts. Automaton has 142484 states and 174936 transitions. Word has length 106 [2022-12-13 14:24:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:24:05,849 INFO L495 AbstractCegarLoop]: Abstraction has 142484 states and 174936 transitions. [2022-12-13 14:24:05,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.65625) internal successors, (277), 32 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:24:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 142484 states and 174936 transitions. [2022-12-13 14:24:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-13 14:24:05,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:24:05,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:24:05,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:24:06,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:24:06,054 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:24:06,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:24:06,055 INFO L85 PathProgramCache]: Analyzing trace with hash 507988149, now seen corresponding path program 1 times [2022-12-13 14:24:06,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:24:06,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885425874] [2022-12-13 14:24:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:06,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:24:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:06,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:24:06,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885425874] [2022-12-13 14:24:06,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885425874] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:24:06,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308033171] [2022-12-13 14:24:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:24:06,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:24:06,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:24:06,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:24:06,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f329122a-d8dc-4723-adfe-b5d21b5a35b3/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:24:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:24:06,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:24:06,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:24:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:07,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:24:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:24:09,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308033171] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:24:09,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:24:09,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 36 [2022-12-13 14:24:09,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227677481] [2022-12-13 14:24:09,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:24:09,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 14:24:09,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:24:09,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 14:24:09,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 14:24:09,387 INFO L87 Difference]: Start difference. First operand 142484 states and 174936 transitions. Second operand has 36 states, 36 states have (on average 8.333333333333334) internal successors, (300), 36 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:25:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:25:46,610 INFO L93 Difference]: Finished difference Result 261782 states and 316334 transitions. [2022-12-13 14:25:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 14:25:46,611 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 8.333333333333334) internal successors, (300), 36 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2022-12-13 14:25:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:25:46,940 INFO L225 Difference]: With dead ends: 261782 [2022-12-13 14:25:46,941 INFO L226 Difference]: Without dead ends: 220138 [2022-12-13 14:25:46,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=915, Invalid=2991, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 14:25:46,999 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 2283 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2283 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 14:25:46,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2283 Valid, 1618 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 14:25:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220138 states.