./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/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_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/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_8a0f59ba-3975-440b-9751-61e0095dcec8/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 74edf29578da59b17de672f50e10ed8f88a3850b8ffae9884ae020db50745360 --- 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 18:13:39,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:13:39,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:13:39,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:13:39,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:13:39,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:13:39,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:13:39,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:13:39,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:13:39,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:13:39,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:13:39,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:13:39,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:13:39,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:13:39,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:13:39,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:13:39,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:13:39,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:13:39,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:13:39,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:13:39,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:13:39,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:13:39,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:13:39,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:13:39,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:13:39,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:13:39,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:13:39,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:13:39,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:13:39,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:13:39,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:13:39,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:13:39,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:13:39,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:13:39,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:13:39,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:13:39,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:13:39,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:13:39,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:13:39,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:13:39,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:13:39,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 18:13:39,310 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:13:39,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:13:39,310 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:13:39,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:13:39,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:13:39,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:13:39,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:13:39,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:13:39,311 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:13:39,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:13:39,312 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:13:39,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:13:39,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:13:39,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:13:39,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:13:39,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:13:39,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:13:39,312 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:13:39,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:13:39,312 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:13:39,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:13:39,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:13:39,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:13:39,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:13:39,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:13:39,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:13:39,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:13:39,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:13:39,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:13:39,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:13:39,314 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:13:39,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:13:39,314 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:13:39,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:13:39,314 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:13:39,314 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_8a0f59ba-3975-440b-9751-61e0095dcec8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74edf29578da59b17de672f50e10ed8f88a3850b8ffae9884ae020db50745360 [2022-12-13 18:13:39,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:13:39,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:13:39,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:13:39,497 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:13:39,498 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:13:39,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/eca-rers2012/Problem03_label51.c [2022-12-13 18:13:42,114 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:13:42,340 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:13:42,340 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/sv-benchmarks/c/eca-rers2012/Problem03_label51.c [2022-12-13 18:13:42,356 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/data/0f614af81/6f382bade5914d5ca5b1e4f61dda3568/FLAG8889a48a4 [2022-12-13 18:13:42,370 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/data/0f614af81/6f382bade5914d5ca5b1e4f61dda3568 [2022-12-13 18:13:42,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:13:42,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:13:42,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:13:42,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:13:42,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:13:42,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:13:42" (1/1) ... [2022-12-13 18:13:42,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383209f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:42, skipping insertion in model container [2022-12-13 18:13:42,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:13:42" (1/1) ... [2022-12-13 18:13:42,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:13:42,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:13:42,856 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_8a0f59ba-3975-440b-9751-61e0095dcec8/sv-benchmarks/c/eca-rers2012/Problem03_label51.c[59610,59623] [2022-12-13 18:13:42,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:13:42,887 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:13:43,040 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_8a0f59ba-3975-440b-9751-61e0095dcec8/sv-benchmarks/c/eca-rers2012/Problem03_label51.c[59610,59623] [2022-12-13 18:13:43,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:13:43,060 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:13:43,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43 WrapperNode [2022-12-13 18:13:43,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:13:43,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:13:43,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:13:43,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:13:43,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,137 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-13 18:13:43,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:13:43,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:13:43,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:13:43,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:13:43,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,193 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:13:43,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:13:43,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:13:43,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:13:43,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (1/1) ... [2022-12-13 18:13:43,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:13:43,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:13:43,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:13:43,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:13:43,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:13:43,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:13:43,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:13:43,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:13:43,342 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:13:43,343 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:13:44,706 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:13:44,716 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:13:44,716 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 18:13:44,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:13:44 BoogieIcfgContainer [2022-12-13 18:13:44,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:13:44,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:13:44,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:13:44,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:13:44,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:13:42" (1/3) ... [2022-12-13 18:13:44,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5300d30f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:13:44, skipping insertion in model container [2022-12-13 18:13:44,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:13:43" (2/3) ... [2022-12-13 18:13:44,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5300d30f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:13:44, skipping insertion in model container [2022-12-13 18:13:44,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:13:44" (3/3) ... [2022-12-13 18:13:44,727 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label51.c [2022-12-13 18:13:44,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:13:44,746 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 18:13:44,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:13:44,806 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;@24e47a9a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:13:44,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 18:13:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 18:13:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-12-13 18:13:44,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:44,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:44,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash 951431538, now seen corresponding path program 1 times [2022-12-13 18:13:44,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:44,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17302518] [2022-12-13 18:13:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:44,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:45,572 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 18:13:45,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:45,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17302518] [2022-12-13 18:13:45,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17302518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:45,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:45,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:13:45,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261268620] [2022-12-13 18:13:45,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:45,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:45,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:45,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:45,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:45,608 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 18:13:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:46,473 INFO L93 Difference]: Finished difference Result 838 states and 1485 transitions. [2022-12-13 18:13:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:46,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 188 [2022-12-13 18:13:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:46,487 INFO L225 Difference]: With dead ends: 838 [2022-12-13 18:13:46,487 INFO L226 Difference]: Without dead ends: 458 [2022-12-13 18:13:46,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:46,492 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 79 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:46,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 143 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 18:13:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-12-13 18:13:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 447. [2022-12-13 18:13:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5919282511210762) internal successors, (710), 446 states have internal predecessors, (710), 0 states have call successors, (0), 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 18:13:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 710 transitions. [2022-12-13 18:13:46,540 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 710 transitions. Word has length 188 [2022-12-13 18:13:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:46,541 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 710 transitions. [2022-12-13 18:13:46,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 18:13:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 710 transitions. [2022-12-13 18:13:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-13 18:13:46,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:46,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:46,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:13:46,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:46,547 INFO L85 PathProgramCache]: Analyzing trace with hash -76393258, now seen corresponding path program 1 times [2022-12-13 18:13:46,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:46,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985372879] [2022-12-13 18:13:46,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:46,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:46,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:46,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985372879] [2022-12-13 18:13:46,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985372879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:46,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:46,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:13:46,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621506275] [2022-12-13 18:13:46,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:46,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:46,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:46,868 INFO L87 Difference]: Start difference. First operand 447 states and 710 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 18:13:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:47,567 INFO L93 Difference]: Finished difference Result 1298 states and 2071 transitions. [2022-12-13 18:13:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:47,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2022-12-13 18:13:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:47,572 INFO L225 Difference]: With dead ends: 1298 [2022-12-13 18:13:47,572 INFO L226 Difference]: Without dead ends: 853 [2022-12-13 18:13:47,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:47,573 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:47,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 192 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 18:13:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-12-13 18:13:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2022-12-13 18:13:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.3873239436619718) internal successors, (1182), 852 states have internal predecessors, (1182), 0 states have call successors, (0), 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 18:13:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1182 transitions. [2022-12-13 18:13:47,594 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1182 transitions. Word has length 194 [2022-12-13 18:13:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:47,594 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 1182 transitions. [2022-12-13 18:13:47,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 18:13:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1182 transitions. [2022-12-13 18:13:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-12-13 18:13:47,597 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:47,597 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:47,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:13:47,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:47,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:47,598 INFO L85 PathProgramCache]: Analyzing trace with hash -647571538, now seen corresponding path program 1 times [2022-12-13 18:13:47,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:47,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838586398] [2022-12-13 18:13:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:47,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:47,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:47,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838586398] [2022-12-13 18:13:47,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838586398] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:47,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:47,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:13:47,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930029075] [2022-12-13 18:13:47,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:47,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:47,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:47,778 INFO L87 Difference]: Start difference. First operand 853 states and 1182 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 18:13:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:48,484 INFO L93 Difference]: Finished difference Result 2535 states and 3513 transitions. [2022-12-13 18:13:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:48,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2022-12-13 18:13:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:48,489 INFO L225 Difference]: With dead ends: 2535 [2022-12-13 18:13:48,490 INFO L226 Difference]: Without dead ends: 1684 [2022-12-13 18:13:48,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:48,491 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:48,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 222 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 18:13:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2022-12-13 18:13:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1682. [2022-12-13 18:13:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1681 states have (on average 1.3277810826888756) internal successors, (2232), 1681 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:13:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2232 transitions. [2022-12-13 18:13:48,515 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2232 transitions. Word has length 201 [2022-12-13 18:13:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:48,515 INFO L495 AbstractCegarLoop]: Abstraction has 1682 states and 2232 transitions. [2022-12-13 18:13:48,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 18:13:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2232 transitions. [2022-12-13 18:13:48,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-13 18:13:48,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:48,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:48,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:13:48,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:48,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1839216971, now seen corresponding path program 1 times [2022-12-13 18:13:48,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:48,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521886379] [2022-12-13 18:13:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:48,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:13:48,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:48,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521886379] [2022-12-13 18:13:48,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521886379] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:48,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:48,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:13:48,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026122574] [2022-12-13 18:13:48,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:48,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:48,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:48,617 INFO L87 Difference]: Start difference. First operand 1682 states and 2232 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 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 18:13:49,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:49,342 INFO L93 Difference]: Finished difference Result 5006 states and 6651 transitions. [2022-12-13 18:13:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:49,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 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 202 [2022-12-13 18:13:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:49,352 INFO L225 Difference]: With dead ends: 5006 [2022-12-13 18:13:49,352 INFO L226 Difference]: Without dead ends: 3326 [2022-12-13 18:13:49,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:49,356 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:49,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 18:13:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2022-12-13 18:13:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 3310. [2022-12-13 18:13:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 3309 states have (on average 1.3019038984587488) internal successors, (4308), 3309 states have internal predecessors, (4308), 0 states have call successors, (0), 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 18:13:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 4308 transitions. [2022-12-13 18:13:49,405 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 4308 transitions. Word has length 202 [2022-12-13 18:13:49,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:49,406 INFO L495 AbstractCegarLoop]: Abstraction has 3310 states and 4308 transitions. [2022-12-13 18:13:49,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 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 18:13:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 4308 transitions. [2022-12-13 18:13:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-13 18:13:49,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:49,410 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:49,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 18:13:49,410 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:49,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1199319968, now seen corresponding path program 1 times [2022-12-13 18:13:49,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:49,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059685565] [2022-12-13 18:13:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:49,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:13:49,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:49,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059685565] [2022-12-13 18:13:49,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059685565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:49,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:49,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:13:49,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161592396] [2022-12-13 18:13:49,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:49,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:49,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:49,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:49,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:49,574 INFO L87 Difference]: Start difference. First operand 3310 states and 4308 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 18:13:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:50,297 INFO L93 Difference]: Finished difference Result 8245 states and 11008 transitions. [2022-12-13 18:13:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:50,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 209 [2022-12-13 18:13:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:50,306 INFO L225 Difference]: With dead ends: 8245 [2022-12-13 18:13:50,306 INFO L226 Difference]: Without dead ends: 4937 [2022-12-13 18:13:50,308 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 18:13:50,309 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 233 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:50,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 404 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 18:13:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2022-12-13 18:13:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 4935. [2022-12-13 18:13:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4935 states, 4934 states have (on average 1.2474665585731657) internal successors, (6155), 4934 states have internal predecessors, (6155), 0 states have call successors, (0), 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 18:13:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 6155 transitions. [2022-12-13 18:13:50,367 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 6155 transitions. Word has length 209 [2022-12-13 18:13:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:50,367 INFO L495 AbstractCegarLoop]: Abstraction has 4935 states and 6155 transitions. [2022-12-13 18:13:50,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 18:13:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 6155 transitions. [2022-12-13 18:13:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-12-13 18:13:50,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:50,373 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:50,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 18:13:50,374 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:50,374 INFO L85 PathProgramCache]: Analyzing trace with hash -456720928, now seen corresponding path program 1 times [2022-12-13 18:13:50,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:50,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387611671] [2022-12-13 18:13:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:50,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 18:13:50,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:50,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387611671] [2022-12-13 18:13:50,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387611671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:50,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:50,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:13:50,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991075265] [2022-12-13 18:13:50,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:50,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:50,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:50,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:50,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:50,659 INFO L87 Difference]: Start difference. First operand 4935 states and 6155 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 18:13:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:51,341 INFO L93 Difference]: Finished difference Result 14564 states and 18200 transitions. [2022-12-13 18:13:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:51,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 242 [2022-12-13 18:13:51,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:51,357 INFO L225 Difference]: With dead ends: 14564 [2022-12-13 18:13:51,357 INFO L226 Difference]: Without dead ends: 9631 [2022-12-13 18:13:51,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:51,360 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 216 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:51,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 196 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:13:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9631 states. [2022-12-13 18:13:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9631 to 9622. [2022-12-13 18:13:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9622 states, 9621 states have (on average 1.2259640370023905) internal successors, (11795), 9621 states have internal predecessors, (11795), 0 states have call successors, (0), 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 18:13:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9622 states to 9622 states and 11795 transitions. [2022-12-13 18:13:51,461 INFO L78 Accepts]: Start accepts. Automaton has 9622 states and 11795 transitions. Word has length 242 [2022-12-13 18:13:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:51,461 INFO L495 AbstractCegarLoop]: Abstraction has 9622 states and 11795 transitions. [2022-12-13 18:13:51,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 18:13:51,461 INFO L276 IsEmpty]: Start isEmpty. Operand 9622 states and 11795 transitions. [2022-12-13 18:13:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-12-13 18:13:51,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:51,471 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:51,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:13:51,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1078259094, now seen corresponding path program 1 times [2022-12-13 18:13:51,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:51,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759618029] [2022-12-13 18:13:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:51,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 18:13:51,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:51,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759618029] [2022-12-13 18:13:51,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759618029] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:51,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:51,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:13:51,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389417534] [2022-12-13 18:13:51,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:51,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:51,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:51,718 INFO L87 Difference]: Start difference. First operand 9622 states and 11795 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 18:13:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:52,514 INFO L93 Difference]: Finished difference Result 25777 states and 31494 transitions. [2022-12-13 18:13:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:52,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 252 [2022-12-13 18:13:52,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:52,538 INFO L225 Difference]: With dead ends: 25777 [2022-12-13 18:13:52,538 INFO L226 Difference]: Without dead ends: 16157 [2022-12-13 18:13:52,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:52,545 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:52,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 223 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 18:13:52,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16157 states. [2022-12-13 18:13:52,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16157 to 16148. [2022-12-13 18:13:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16148 states, 16147 states have (on average 1.2127330154208211) internal successors, (19582), 16147 states have internal predecessors, (19582), 0 states have call successors, (0), 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 18:13:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16148 states to 16148 states and 19582 transitions. [2022-12-13 18:13:52,726 INFO L78 Accepts]: Start accepts. Automaton has 16148 states and 19582 transitions. Word has length 252 [2022-12-13 18:13:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:52,726 INFO L495 AbstractCegarLoop]: Abstraction has 16148 states and 19582 transitions. [2022-12-13 18:13:52,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 18:13:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 16148 states and 19582 transitions. [2022-12-13 18:13:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-12-13 18:13:52,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:52,748 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:52,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 18:13:52,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1716419235, now seen corresponding path program 1 times [2022-12-13 18:13:52,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:52,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884601205] [2022-12-13 18:13:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:52,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-13 18:13:53,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:53,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884601205] [2022-12-13 18:13:53,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884601205] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:53,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:53,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:13:53,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970962248] [2022-12-13 18:13:53,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:53,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:13:53,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:13:53,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:13:53,093 INFO L87 Difference]: Start difference. First operand 16148 states and 19582 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 18:13:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:53,841 INFO L93 Difference]: Finished difference Result 37733 states and 45990 transitions. [2022-12-13 18:13:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:13:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 254 [2022-12-13 18:13:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:53,866 INFO L225 Difference]: With dead ends: 37733 [2022-12-13 18:13:53,866 INFO L226 Difference]: Without dead ends: 22196 [2022-12-13 18:13:53,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:13:53,874 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 471 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:53,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 53 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:13:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22196 states. [2022-12-13 18:13:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22196 to 22189. [2022-12-13 18:13:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22189 states, 22188 states have (on average 1.1619343789435732) internal successors, (25781), 22188 states have internal predecessors, (25781), 0 states have call successors, (0), 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 18:13:54,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22189 states to 22189 states and 25781 transitions. [2022-12-13 18:13:54,097 INFO L78 Accepts]: Start accepts. Automaton has 22189 states and 25781 transitions. Word has length 254 [2022-12-13 18:13:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:54,098 INFO L495 AbstractCegarLoop]: Abstraction has 22189 states and 25781 transitions. [2022-12-13 18:13:54,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 18:13:54,098 INFO L276 IsEmpty]: Start isEmpty. Operand 22189 states and 25781 transitions. [2022-12-13 18:13:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-12-13 18:13:54,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:54,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:54,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 18:13:54,112 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash 721693502, now seen corresponding path program 1 times [2022-12-13 18:13:54,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:54,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095396820] [2022-12-13 18:13:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:54,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:54,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:54,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095396820] [2022-12-13 18:13:54,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095396820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:54,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:54,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:13:54,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300367321] [2022-12-13 18:13:54,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:54,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:54,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:54,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:54,577 INFO L87 Difference]: Start difference. First operand 22189 states and 25781 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 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 18:13:55,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:55,095 INFO L93 Difference]: Finished difference Result 39085 states and 45310 transitions. [2022-12-13 18:13:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:55,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 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 262 [2022-12-13 18:13:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:55,119 INFO L225 Difference]: With dead ends: 39085 [2022-12-13 18:13:55,119 INFO L226 Difference]: Without dead ends: 22189 [2022-12-13 18:13:55,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:55,129 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:55,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 151 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:13:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22189 states. [2022-12-13 18:13:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22189 to 22189. [2022-12-13 18:13:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22189 states, 22188 states have (on average 1.1617991707229134) internal successors, (25778), 22188 states have internal predecessors, (25778), 0 states have call successors, (0), 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 18:13:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22189 states to 22189 states and 25778 transitions. [2022-12-13 18:13:55,345 INFO L78 Accepts]: Start accepts. Automaton has 22189 states and 25778 transitions. Word has length 262 [2022-12-13 18:13:55,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:55,345 INFO L495 AbstractCegarLoop]: Abstraction has 22189 states and 25778 transitions. [2022-12-13 18:13:55,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 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 18:13:55,345 INFO L276 IsEmpty]: Start isEmpty. Operand 22189 states and 25778 transitions. [2022-12-13 18:13:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-12-13 18:13:55,358 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:55,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:55,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 18:13:55,358 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:55,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1883142043, now seen corresponding path program 1 times [2022-12-13 18:13:55,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:55,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204141586] [2022-12-13 18:13:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:55,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:13:55,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:55,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204141586] [2022-12-13 18:13:55,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204141586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:55,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:55,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:13:55,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198566448] [2022-12-13 18:13:55,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:55,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:55,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:55,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:55,573 INFO L87 Difference]: Start difference. First operand 22189 states and 25778 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 18:13:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:56,193 INFO L93 Difference]: Finished difference Result 42760 states and 50059 transitions. [2022-12-13 18:13:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:56,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 269 [2022-12-13 18:13:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:56,217 INFO L225 Difference]: With dead ends: 42760 [2022-12-13 18:13:56,217 INFO L226 Difference]: Without dead ends: 27898 [2022-12-13 18:13:56,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:56,228 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 160 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:56,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 123 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:13:56,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27898 states. [2022-12-13 18:13:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27898 to 25854. [2022-12-13 18:13:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25854 states, 25853 states have (on average 1.1790894673732255) internal successors, (30483), 25853 states have internal predecessors, (30483), 0 states have call successors, (0), 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 18:13:56,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25854 states to 25854 states and 30483 transitions. [2022-12-13 18:13:56,604 INFO L78 Accepts]: Start accepts. Automaton has 25854 states and 30483 transitions. Word has length 269 [2022-12-13 18:13:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:56,604 INFO L495 AbstractCegarLoop]: Abstraction has 25854 states and 30483 transitions. [2022-12-13 18:13:56,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 18:13:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 25854 states and 30483 transitions. [2022-12-13 18:13:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-12-13 18:13:56,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:56,618 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:56,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 18:13:56,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:56,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:56,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1633522528, now seen corresponding path program 1 times [2022-12-13 18:13:56,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:56,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053748604] [2022-12-13 18:13:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:56,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-13 18:13:56,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:56,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053748604] [2022-12-13 18:13:56,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053748604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:56,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:56,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:13:56,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579078878] [2022-12-13 18:13:56,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:56,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:56,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:56,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:56,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:56,854 INFO L87 Difference]: Start difference. First operand 25854 states and 30483 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 18:13:57,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:57,599 INFO L93 Difference]: Finished difference Result 53739 states and 63203 transitions. [2022-12-13 18:13:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:13:57,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 278 [2022-12-13 18:13:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:57,626 INFO L225 Difference]: With dead ends: 53739 [2022-12-13 18:13:57,626 INFO L226 Difference]: Without dead ends: 29311 [2022-12-13 18:13:57,640 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 18:13:57,641 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 184 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:57,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 356 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:13:57,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29311 states. [2022-12-13 18:13:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29311 to 28493. [2022-12-13 18:13:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28493 states, 28492 states have (on average 1.1665379755720904) internal successors, (33237), 28492 states have internal predecessors, (33237), 0 states have call successors, (0), 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 18:13:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28493 states to 28493 states and 33237 transitions. [2022-12-13 18:13:57,914 INFO L78 Accepts]: Start accepts. Automaton has 28493 states and 33237 transitions. Word has length 278 [2022-12-13 18:13:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:57,914 INFO L495 AbstractCegarLoop]: Abstraction has 28493 states and 33237 transitions. [2022-12-13 18:13:57,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 18:13:57,914 INFO L276 IsEmpty]: Start isEmpty. Operand 28493 states and 33237 transitions. [2022-12-13 18:13:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-12-13 18:13:57,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:57,927 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:57,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 18:13:57,928 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash 355292115, now seen corresponding path program 1 times [2022-12-13 18:13:57,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:57,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051414710] [2022-12-13 18:13:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:57,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:13:58,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:58,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051414710] [2022-12-13 18:13:58,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051414710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:58,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:58,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:13:58,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556091993] [2022-12-13 18:13:58,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:58,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:13:58,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:13:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:13:58,234 INFO L87 Difference]: Start difference. First operand 28493 states and 33237 transitions. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 18:13:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:13:59,340 INFO L93 Difference]: Finished difference Result 52924 states and 61838 transitions. [2022-12-13 18:13:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:13:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 290 [2022-12-13 18:13:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:13:59,364 INFO L225 Difference]: With dead ends: 52924 [2022-12-13 18:13:59,364 INFO L226 Difference]: Without dead ends: 29320 [2022-12-13 18:13:59,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:13:59,377 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 335 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 18:13:59,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 82 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 18:13:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29320 states. [2022-12-13 18:13:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29320 to 28293. [2022-12-13 18:13:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28293 states, 28292 states have (on average 1.1119751166407466) internal successors, (31460), 28292 states have internal predecessors, (31460), 0 states have call successors, (0), 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 18:13:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28293 states to 28293 states and 31460 transitions. [2022-12-13 18:13:59,649 INFO L78 Accepts]: Start accepts. Automaton has 28293 states and 31460 transitions. Word has length 290 [2022-12-13 18:13:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:13:59,649 INFO L495 AbstractCegarLoop]: Abstraction has 28293 states and 31460 transitions. [2022-12-13 18:13:59,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 18:13:59,650 INFO L276 IsEmpty]: Start isEmpty. Operand 28293 states and 31460 transitions. [2022-12-13 18:13:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-12-13 18:13:59,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:13:59,663 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:13:59,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 18:13:59,663 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:13:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:13:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash -384986369, now seen corresponding path program 1 times [2022-12-13 18:13:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:13:59,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832280217] [2022-12-13 18:13:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:13:59,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:13:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:13:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-13 18:13:59,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:13:59,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832280217] [2022-12-13 18:13:59,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832280217] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:13:59,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:13:59,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:13:59,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743973713] [2022-12-13 18:13:59,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:13:59,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:13:59,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:13:59,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:13:59,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:13:59,932 INFO L87 Difference]: Start difference. First operand 28293 states and 31460 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 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 18:14:00,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:00,655 INFO L93 Difference]: Finished difference Result 66975 states and 74879 transitions. [2022-12-13 18:14:00,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:00,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 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 292 [2022-12-13 18:14:00,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:00,686 INFO L225 Difference]: With dead ends: 66975 [2022-12-13 18:14:00,687 INFO L226 Difference]: Without dead ends: 39905 [2022-12-13 18:14:00,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:14:00,701 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 200 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:00,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 101 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:14:00,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39905 states. [2022-12-13 18:14:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39905 to 39686. [2022-12-13 18:14:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39686 states, 39685 states have (on average 1.1194405946831296) internal successors, (44425), 39685 states have internal predecessors, (44425), 0 states have call successors, (0), 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 18:14:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39686 states to 39686 states and 44425 transitions. [2022-12-13 18:14:01,069 INFO L78 Accepts]: Start accepts. Automaton has 39686 states and 44425 transitions. Word has length 292 [2022-12-13 18:14:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:01,069 INFO L495 AbstractCegarLoop]: Abstraction has 39686 states and 44425 transitions. [2022-12-13 18:14:01,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 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 18:14:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 39686 states and 44425 transitions. [2022-12-13 18:14:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-12-13 18:14:01,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:01,083 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:01,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 18:14:01,084 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash -268199450, now seen corresponding path program 1 times [2022-12-13 18:14:01,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:01,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122608760] [2022-12-13 18:14:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:01,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-13 18:14:01,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:01,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122608760] [2022-12-13 18:14:01,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122608760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:01,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816476819] [2022-12-13 18:14:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:01,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:01,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:01,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:01,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:14:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:14:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-13 18:14:01,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:01,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816476819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:01,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:01,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 18:14:01,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035470394] [2022-12-13 18:14:01,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:01,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:01,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:01,842 INFO L87 Difference]: Start difference. First operand 39686 states and 44425 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 18:14:02,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:02,492 INFO L93 Difference]: Finished difference Result 72661 states and 81216 transitions. [2022-12-13 18:14:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:02,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 301 [2022-12-13 18:14:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:02,527 INFO L225 Difference]: With dead ends: 72661 [2022-12-13 18:14:02,527 INFO L226 Difference]: Without dead ends: 37858 [2022-12-13 18:14:02,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:02,546 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 43 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:02,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 94 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:14:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37858 states. [2022-12-13 18:14:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37858 to 32971. [2022-12-13 18:14:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32971 states, 32970 states have (on average 1.1095238095238096) internal successors, (36581), 32970 states have internal predecessors, (36581), 0 states have call successors, (0), 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 18:14:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32971 states to 32971 states and 36581 transitions. [2022-12-13 18:14:02,974 INFO L78 Accepts]: Start accepts. Automaton has 32971 states and 36581 transitions. Word has length 301 [2022-12-13 18:14:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:02,974 INFO L495 AbstractCegarLoop]: Abstraction has 32971 states and 36581 transitions. [2022-12-13 18:14:02,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 18:14:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 32971 states and 36581 transitions. [2022-12-13 18:14:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-12-13 18:14:02,988 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:02,988 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 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 18:14:02,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:14:03,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 18:14:03,190 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash -768612039, now seen corresponding path program 1 times [2022-12-13 18:14:03,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:03,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401575803] [2022-12-13 18:14:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:03,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 131 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:04,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:04,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401575803] [2022-12-13 18:14:04,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401575803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:04,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222647633] [2022-12-13 18:14:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:04,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:04,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:04,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:14:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:04,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:14:04,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 18:14:04,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:04,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222647633] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:04,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:04,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-13 18:14:04,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296584481] [2022-12-13 18:14:04,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:04,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:04,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:04,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:04,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:14:04,490 INFO L87 Difference]: Start difference. First operand 32971 states and 36581 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 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 18:14:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:05,174 INFO L93 Difference]: Finished difference Result 75903 states and 84381 transitions. [2022-12-13 18:14:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:05,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 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 320 [2022-12-13 18:14:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:05,213 INFO L225 Difference]: With dead ends: 75903 [2022-12-13 18:14:05,213 INFO L226 Difference]: Without dead ends: 43951 [2022-12-13 18:14:05,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:14:05,231 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 143 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:05,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 107 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:14:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43951 states. [2022-12-13 18:14:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43951 to 42727. [2022-12-13 18:14:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42727 states, 42726 states have (on average 1.1046201376211207) internal successors, (47196), 42726 states have internal predecessors, (47196), 0 states have call successors, (0), 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 18:14:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42727 states to 42727 states and 47196 transitions. [2022-12-13 18:14:05,629 INFO L78 Accepts]: Start accepts. Automaton has 42727 states and 47196 transitions. Word has length 320 [2022-12-13 18:14:05,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:05,629 INFO L495 AbstractCegarLoop]: Abstraction has 42727 states and 47196 transitions. [2022-12-13 18:14:05,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 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 18:14:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 42727 states and 47196 transitions. [2022-12-13 18:14:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-12-13 18:14:05,650 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:05,651 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:05,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 18:14:05,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:05,853 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1210172478, now seen corresponding path program 1 times [2022-12-13 18:14:05,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:05,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341816774] [2022-12-13 18:14:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:05,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:06,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:06,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341816774] [2022-12-13 18:14:06,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341816774] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:06,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320142295] [2022-12-13 18:14:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:06,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:06,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:06,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:06,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:14:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:06,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:14:06,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 18:14:06,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:06,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320142295] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:06,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:06,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 18:14:06,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119175910] [2022-12-13 18:14:06,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:06,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:06,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:06,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:06,494 INFO L87 Difference]: Start difference. First operand 42727 states and 47196 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 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 18:14:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:06,858 INFO L93 Difference]: Finished difference Result 98276 states and 108490 transitions. [2022-12-13 18:14:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 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 329 [2022-12-13 18:14:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:06,915 INFO L225 Difference]: With dead ends: 98276 [2022-12-13 18:14:06,915 INFO L226 Difference]: Without dead ends: 64501 [2022-12-13 18:14:06,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:06,935 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 201 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:06,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 480 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:14:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64501 states. [2022-12-13 18:14:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64501 to 64499. [2022-12-13 18:14:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64499 states, 64498 states have (on average 1.1001736487953115) internal successors, (70959), 64498 states have internal predecessors, (70959), 0 states have call successors, (0), 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 18:14:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64499 states to 64499 states and 70959 transitions. [2022-12-13 18:14:07,660 INFO L78 Accepts]: Start accepts. Automaton has 64499 states and 70959 transitions. Word has length 329 [2022-12-13 18:14:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:07,661 INFO L495 AbstractCegarLoop]: Abstraction has 64499 states and 70959 transitions. [2022-12-13 18:14:07,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 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 18:14:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 64499 states and 70959 transitions. [2022-12-13 18:14:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-12-13 18:14:07,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:07,699 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:07,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:14:07,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 18:14:07,900 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:07,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:07,901 INFO L85 PathProgramCache]: Analyzing trace with hash -41426837, now seen corresponding path program 1 times [2022-12-13 18:14:07,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:07,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392812098] [2022-12-13 18:14:07,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:07,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 18:14:08,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:08,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392812098] [2022-12-13 18:14:08,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392812098] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:08,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976637783] [2022-12-13 18:14:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:08,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:08,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:08,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:08,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:14:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:08,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:14:08,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-13 18:14:08,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:08,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976637783] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:08,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:08,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 18:14:08,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541329251] [2022-12-13 18:14:08,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:08,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:08,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:08,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:08,736 INFO L87 Difference]: Start difference. First operand 64499 states and 70959 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 18:14:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:09,386 INFO L93 Difference]: Finished difference Result 121681 states and 134129 transitions. [2022-12-13 18:14:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 333 [2022-12-13 18:14:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:09,443 INFO L225 Difference]: With dead ends: 121681 [2022-12-13 18:14:09,443 INFO L226 Difference]: Without dead ends: 58404 [2022-12-13 18:14:09,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:09,467 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 76 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:09,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 275 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:14:09,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58404 states. [2022-12-13 18:14:10,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58404 to 58395. [2022-12-13 18:14:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58395 states, 58394 states have (on average 1.096071514196664) internal successors, (64004), 58394 states have internal predecessors, (64004), 0 states have call successors, (0), 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 18:14:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58395 states to 58395 states and 64004 transitions. [2022-12-13 18:14:10,121 INFO L78 Accepts]: Start accepts. Automaton has 58395 states and 64004 transitions. Word has length 333 [2022-12-13 18:14:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:10,121 INFO L495 AbstractCegarLoop]: Abstraction has 58395 states and 64004 transitions. [2022-12-13 18:14:10,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 18:14:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 58395 states and 64004 transitions. [2022-12-13 18:14:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-12-13 18:14:10,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:10,146 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:10,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:14:10,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 18:14:10,348 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash -31533363, now seen corresponding path program 1 times [2022-12-13 18:14:10,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:10,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107418331] [2022-12-13 18:14:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:10,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 163 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 18:14:10,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:10,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107418331] [2022-12-13 18:14:10,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107418331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:10,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174395972] [2022-12-13 18:14:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:10,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:10,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:10,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:10,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:14:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:10,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:14:10,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-13 18:14:10,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:10,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174395972] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:10,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:10,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-13 18:14:10,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572371137] [2022-12-13 18:14:10,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:10,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:10,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:10,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:10,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:10,936 INFO L87 Difference]: Start difference. First operand 58395 states and 64004 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 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 18:14:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:11,483 INFO L93 Difference]: Finished difference Result 153824 states and 168546 transitions. [2022-12-13 18:14:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:11,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 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 343 [2022-12-13 18:14:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:11,570 INFO L225 Difference]: With dead ends: 153824 [2022-12-13 18:14:11,570 INFO L226 Difference]: Without dead ends: 96854 [2022-12-13 18:14:11,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:11,604 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 179 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:11,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 474 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:14:11,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96854 states. [2022-12-13 18:14:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96854 to 96841. [2022-12-13 18:14:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96841 states, 96840 states have (on average 1.094568360181743) internal successors, (105998), 96840 states have internal predecessors, (105998), 0 states have call successors, (0), 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 18:14:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96841 states to 96841 states and 105998 transitions. [2022-12-13 18:14:12,575 INFO L78 Accepts]: Start accepts. Automaton has 96841 states and 105998 transitions. Word has length 343 [2022-12-13 18:14:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:12,576 INFO L495 AbstractCegarLoop]: Abstraction has 96841 states and 105998 transitions. [2022-12-13 18:14:12,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 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 18:14:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 96841 states and 105998 transitions. [2022-12-13 18:14:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-12-13 18:14:12,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:12,599 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:12,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 18:14:12,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 18:14:12,802 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:12,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:12,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1352915642, now seen corresponding path program 1 times [2022-12-13 18:14:12,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:12,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465469270] [2022-12-13 18:14:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:12,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 136 proven. 6 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-13 18:14:13,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:13,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465469270] [2022-12-13 18:14:13,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465469270] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:13,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132368226] [2022-12-13 18:14:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:13,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:13,319 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:13,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:14:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:13,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:14:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-12-13 18:14:13,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:13,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132368226] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:13,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:13,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 18:14:13,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972770657] [2022-12-13 18:14:13,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:13,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:13,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:13,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:13,724 INFO L87 Difference]: Start difference. First operand 96841 states and 105998 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 18:14:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:14,704 INFO L93 Difference]: Finished difference Result 185191 states and 202528 transitions. [2022-12-13 18:14:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:14,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 352 [2022-12-13 18:14:14,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:14,795 INFO L225 Difference]: With dead ends: 185191 [2022-12-13 18:14:14,795 INFO L226 Difference]: Without dead ends: 88555 [2022-12-13 18:14:14,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:14,842 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 37 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:14,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 325 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:14:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88555 states. [2022-12-13 18:14:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88555 to 88508. [2022-12-13 18:14:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88508 states, 88507 states have (on average 1.0882077123843312) internal successors, (96314), 88507 states have internal predecessors, (96314), 0 states have call successors, (0), 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 18:14:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88508 states to 88508 states and 96314 transitions. [2022-12-13 18:14:15,916 INFO L78 Accepts]: Start accepts. Automaton has 88508 states and 96314 transitions. Word has length 352 [2022-12-13 18:14:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:15,917 INFO L495 AbstractCegarLoop]: Abstraction has 88508 states and 96314 transitions. [2022-12-13 18:14:15,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 18:14:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 88508 states and 96314 transitions. [2022-12-13 18:14:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-12-13 18:14:15,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:15,943 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:15,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 18:14:16,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:16,145 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1362709593, now seen corresponding path program 1 times [2022-12-13 18:14:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:16,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418076103] [2022-12-13 18:14:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:16,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 213 proven. 58 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 18:14:17,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:17,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418076103] [2022-12-13 18:14:17,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418076103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:17,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373124513] [2022-12-13 18:14:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:17,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:17,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:17,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:17,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:14:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:17,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:14:17,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 18:14:17,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:17,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373124513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:17,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:17,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-12-13 18:14:17,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631131752] [2022-12-13 18:14:17,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:17,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:14:17,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:17,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:14:17,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:14:17,744 INFO L87 Difference]: Start difference. First operand 88508 states and 96314 transitions. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 18:14:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:18,898 INFO L93 Difference]: Finished difference Result 181349 states and 197498 transitions. [2022-12-13 18:14:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:14:18,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 373 [2022-12-13 18:14:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:18,984 INFO L225 Difference]: With dead ends: 181349 [2022-12-13 18:14:18,984 INFO L226 Difference]: Without dead ends: 94264 [2022-12-13 18:14:19,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:14:19,019 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 291 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:19,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 103 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 18:14:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94264 states. [2022-12-13 18:14:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94264 to 90739. [2022-12-13 18:14:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90739 states, 90738 states have (on average 1.079657916198285) internal successors, (97966), 90738 states have internal predecessors, (97966), 0 states have call successors, (0), 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 18:14:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90739 states to 90739 states and 97966 transitions. [2022-12-13 18:14:20,334 INFO L78 Accepts]: Start accepts. Automaton has 90739 states and 97966 transitions. Word has length 373 [2022-12-13 18:14:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:20,335 INFO L495 AbstractCegarLoop]: Abstraction has 90739 states and 97966 transitions. [2022-12-13 18:14:20,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 18:14:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 90739 states and 97966 transitions. [2022-12-13 18:14:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-12-13 18:14:20,375 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:20,376 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 18:14:20,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:14:20,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:20,578 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:20,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash -755950805, now seen corresponding path program 1 times [2022-12-13 18:14:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:20,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514583681] [2022-12-13 18:14:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:20,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 230 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:21,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:21,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514583681] [2022-12-13 18:14:21,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514583681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:21,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470357585] [2022-12-13 18:14:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:21,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:21,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:21,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:21,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:14:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:21,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:14:21,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:14:21,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:21,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470357585] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:21,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:21,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 18:14:21,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591336839] [2022-12-13 18:14:21,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:21,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:21,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:21,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:14:21,634 INFO L87 Difference]: Start difference. First operand 90739 states and 97966 transitions. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 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 18:14:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:22,421 INFO L93 Difference]: Finished difference Result 166819 states and 179891 transitions. [2022-12-13 18:14:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:22,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 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 377 [2022-12-13 18:14:22,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:22,487 INFO L225 Difference]: With dead ends: 166819 [2022-12-13 18:14:22,488 INFO L226 Difference]: Without dead ends: 77503 [2022-12-13 18:14:22,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:14:22,521 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 195 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:22,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 305 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:14:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77503 states. [2022-12-13 18:14:23,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77503 to 76682. [2022-12-13 18:14:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76682 states, 76681 states have (on average 1.0601191951070017) internal successors, (81291), 76681 states have internal predecessors, (81291), 0 states have call successors, (0), 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 18:14:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76682 states to 76682 states and 81291 transitions. [2022-12-13 18:14:23,286 INFO L78 Accepts]: Start accepts. Automaton has 76682 states and 81291 transitions. Word has length 377 [2022-12-13 18:14:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:23,286 INFO L495 AbstractCegarLoop]: Abstraction has 76682 states and 81291 transitions. [2022-12-13 18:14:23,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 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 18:14:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 76682 states and 81291 transitions. [2022-12-13 18:14:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-12-13 18:14:23,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:23,303 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 18:14:23,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 18:14:23,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:23,507 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:23,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2134898715, now seen corresponding path program 1 times [2022-12-13 18:14:23,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:23,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180383449] [2022-12-13 18:14:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:23,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 221 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 18:14:23,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180383449] [2022-12-13 18:14:23,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180383449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994893611] [2022-12-13 18:14:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:23,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:23,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:23,946 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:23,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 18:14:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:24,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:14:24,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-13 18:14:24,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:24,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994893611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:24,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:24,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 18:14:24,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088867110] [2022-12-13 18:14:24,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:24,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:24,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:24,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:14:24,169 INFO L87 Difference]: Start difference. First operand 76682 states and 81291 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 18:14:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:25,021 INFO L93 Difference]: Finished difference Result 148709 states and 157613 transitions. [2022-12-13 18:14:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:25,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 389 [2022-12-13 18:14:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:25,078 INFO L225 Difference]: With dead ends: 148709 [2022-12-13 18:14:25,078 INFO L226 Difference]: Without dead ends: 73450 [2022-12-13 18:14:25,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:14:25,093 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 210 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:25,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 328 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:14:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73450 states. [2022-12-13 18:14:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73450 to 69163. [2022-12-13 18:14:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69163 states, 69162 states have (on average 1.0540614788467655) internal successors, (72901), 69162 states have internal predecessors, (72901), 0 states have call successors, (0), 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 18:14:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69163 states to 69163 states and 72901 transitions. [2022-12-13 18:14:25,786 INFO L78 Accepts]: Start accepts. Automaton has 69163 states and 72901 transitions. Word has length 389 [2022-12-13 18:14:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:25,786 INFO L495 AbstractCegarLoop]: Abstraction has 69163 states and 72901 transitions. [2022-12-13 18:14:25,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 18:14:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 69163 states and 72901 transitions. [2022-12-13 18:14:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-12-13 18:14:25,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:25,802 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2022-12-13 18:14:25,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 18:14:26,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:26,004 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1705730616, now seen corresponding path program 1 times [2022-12-13 18:14:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:26,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146778291] [2022-12-13 18:14:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 236 proven. 30 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 18:14:26,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:26,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146778291] [2022-12-13 18:14:26,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146778291] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:26,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864781877] [2022-12-13 18:14:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:26,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:26,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:26,463 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:26,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 18:14:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:26,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:14:26,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:27,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:27,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864781877] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:27,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:27,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-12-13 18:14:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224687160] [2022-12-13 18:14:27,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:27,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:14:27,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:27,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:14:27,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:14:27,064 INFO L87 Difference]: Start difference. First operand 69163 states and 72901 transitions. Second operand has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 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 18:14:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:28,571 INFO L93 Difference]: Finished difference Result 167011 states and 176574 transitions. [2022-12-13 18:14:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:14:28,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 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 397 [2022-12-13 18:14:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:28,658 INFO L225 Difference]: With dead ends: 167011 [2022-12-13 18:14:28,658 INFO L226 Difference]: Without dead ends: 96429 [2022-12-13 18:14:28,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:14:28,678 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 262 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:28,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 336 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 18:14:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96429 states. [2022-12-13 18:14:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96429 to 89913. [2022-12-13 18:14:29,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89913 states, 89912 states have (on average 1.0514725509386955) internal successors, (94540), 89912 states have internal predecessors, (94540), 0 states have call successors, (0), 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 18:14:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89913 states to 89913 states and 94540 transitions. [2022-12-13 18:14:29,637 INFO L78 Accepts]: Start accepts. Automaton has 89913 states and 94540 transitions. Word has length 397 [2022-12-13 18:14:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:29,637 INFO L495 AbstractCegarLoop]: Abstraction has 89913 states and 94540 transitions. [2022-12-13 18:14:29,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 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 18:14:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 89913 states and 94540 transitions. [2022-12-13 18:14:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-12-13 18:14:29,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:29,660 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:29,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 18:14:29,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:29,861 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash 765164126, now seen corresponding path program 1 times [2022-12-13 18:14:29,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:29,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731746809] [2022-12-13 18:14:29,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:29,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 18:14:30,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:30,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731746809] [2022-12-13 18:14:30,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731746809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:30,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:14:30,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:14:30,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359685235] [2022-12-13 18:14:30,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:30,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:30,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:14:30,222 INFO L87 Difference]: Start difference. First operand 89913 states and 94540 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 18:14:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:31,262 INFO L93 Difference]: Finished difference Result 183695 states and 193063 transitions. [2022-12-13 18:14:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 407 [2022-12-13 18:14:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:31,349 INFO L225 Difference]: With dead ends: 183695 [2022-12-13 18:14:31,349 INFO L226 Difference]: Without dead ends: 94393 [2022-12-13 18:14:31,379 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 18:14:31,380 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 161 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:31,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 325 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:14:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94393 states. [2022-12-13 18:14:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94393 to 93567. [2022-12-13 18:14:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93567 states, 93566 states have (on average 1.0481585191201932) internal successors, (98072), 93566 states have internal predecessors, (98072), 0 states have call successors, (0), 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 18:14:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93567 states to 93567 states and 98072 transitions. [2022-12-13 18:14:32,739 INFO L78 Accepts]: Start accepts. Automaton has 93567 states and 98072 transitions. Word has length 407 [2022-12-13 18:14:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:32,739 INFO L495 AbstractCegarLoop]: Abstraction has 93567 states and 98072 transitions. [2022-12-13 18:14:32,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 18:14:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 93567 states and 98072 transitions. [2022-12-13 18:14:32,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-12-13 18:14:32,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:32,762 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 18:14:32,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 18:14:32,762 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:32,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:32,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1323965332, now seen corresponding path program 1 times [2022-12-13 18:14:32,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:32,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787250419] [2022-12-13 18:14:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:32,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 254 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-13 18:14:33,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:33,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787250419] [2022-12-13 18:14:33,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787250419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:33,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062444427] [2022-12-13 18:14:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:33,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:33,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:33,157 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:33,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 18:14:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:33,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:14:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 18:14:33,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:33,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062444427] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:33,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:33,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-12-13 18:14:33,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956450566] [2022-12-13 18:14:33,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:33,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:14:33,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:33,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:14:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:33,504 INFO L87 Difference]: Start difference. First operand 93567 states and 98072 transitions. Second operand has 4 states, 4 states have (on average 90.25) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 18:14:34,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:34,882 INFO L93 Difference]: Finished difference Result 240057 states and 251719 transitions. [2022-12-13 18:14:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:14:34,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.25) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 407 [2022-12-13 18:14:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:35,028 INFO L225 Difference]: With dead ends: 240057 [2022-12-13 18:14:35,028 INFO L226 Difference]: Without dead ends: 147913 [2022-12-13 18:14:35,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:35,073 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 330 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:35,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 435 Invalid, 787 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 18:14:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147913 states. [2022-12-13 18:14:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147913 to 136903. [2022-12-13 18:14:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136903 states, 136902 states have (on average 1.0495171728681831) internal successors, (143681), 136902 states have internal predecessors, (143681), 0 states have call successors, (0), 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 18:14:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136903 states to 136903 states and 143681 transitions. [2022-12-13 18:14:36,708 INFO L78 Accepts]: Start accepts. Automaton has 136903 states and 143681 transitions. Word has length 407 [2022-12-13 18:14:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:36,708 INFO L495 AbstractCegarLoop]: Abstraction has 136903 states and 143681 transitions. [2022-12-13 18:14:36,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.25) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 18:14:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 136903 states and 143681 transitions. [2022-12-13 18:14:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2022-12-13 18:14:36,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:36,731 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 18:14:36,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 18:14:36,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 18:14:36,933 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:36,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:36,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1837434584, now seen corresponding path program 1 times [2022-12-13 18:14:36,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:36,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864201682] [2022-12-13 18:14:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:36,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 287 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 18:14:38,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:38,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864201682] [2022-12-13 18:14:38,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864201682] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:38,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341948977] [2022-12-13 18:14:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:38,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:38,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:38,179 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:38,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 18:14:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:14:38,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 18:14:38,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:38,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341948977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:38,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:38,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-12-13 18:14:38,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049186247] [2022-12-13 18:14:38,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:38,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:38,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:38,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:38,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:14:38,637 INFO L87 Difference]: Start difference. First operand 136903 states and 143681 transitions. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 18:14:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:39,712 INFO L93 Difference]: Finished difference Result 277287 states and 291088 transitions. [2022-12-13 18:14:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:39,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 424 [2022-12-13 18:14:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:39,849 INFO L225 Difference]: With dead ends: 277287 [2022-12-13 18:14:39,849 INFO L226 Difference]: Without dead ends: 141807 [2022-12-13 18:14:39,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:14:39,909 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 150 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:39,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 333 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:14:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141807 states. [2022-12-13 18:14:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141807 to 137715. [2022-12-13 18:14:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137715 states, 137714 states have (on average 1.0453330816039037) internal successors, (143957), 137714 states have internal predecessors, (143957), 0 states have call successors, (0), 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 18:14:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137715 states to 137715 states and 143957 transitions. [2022-12-13 18:14:41,693 INFO L78 Accepts]: Start accepts. Automaton has 137715 states and 143957 transitions. Word has length 424 [2022-12-13 18:14:41,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:41,694 INFO L495 AbstractCegarLoop]: Abstraction has 137715 states and 143957 transitions. [2022-12-13 18:14:41,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 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 18:14:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 137715 states and 143957 transitions. [2022-12-13 18:14:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-12-13 18:14:41,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:41,729 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:14:41,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 18:14:41,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 18:14:41,931 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1391731963, now seen corresponding path program 1 times [2022-12-13 18:14:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:41,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272464935] [2022-12-13 18:14:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:41,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 352 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:14:43,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:43,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272464935] [2022-12-13 18:14:43,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272464935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:43,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810044164] [2022-12-13 18:14:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:43,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:43,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:43,857 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:43,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 18:14:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:44,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:14:44,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-13 18:14:44,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:44,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810044164] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:44,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:44,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-12-13 18:14:44,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492446534] [2022-12-13 18:14:44,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:44,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:14:44,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:44,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:14:44,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:14:44,461 INFO L87 Difference]: Start difference. First operand 137715 states and 143957 transitions. Second operand has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 18:14:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:46,197 INFO L93 Difference]: Finished difference Result 338661 states and 353099 transitions. [2022-12-13 18:14:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:14:46,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 434 [2022-12-13 18:14:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:46,420 INFO L225 Difference]: With dead ends: 338661 [2022-12-13 18:14:46,420 INFO L226 Difference]: Without dead ends: 202369 [2022-12-13 18:14:46,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:14:46,493 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 701 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:46,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 406 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 18:14:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202369 states. [2022-12-13 18:14:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202369 to 185914. [2022-12-13 18:14:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185914 states, 185913 states have (on average 1.0426489809749722) internal successors, (193842), 185913 states have internal predecessors, (193842), 0 states have call successors, (0), 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 18:14:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185914 states to 185914 states and 193842 transitions. [2022-12-13 18:14:49,118 INFO L78 Accepts]: Start accepts. Automaton has 185914 states and 193842 transitions. Word has length 434 [2022-12-13 18:14:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:49,118 INFO L495 AbstractCegarLoop]: Abstraction has 185914 states and 193842 transitions. [2022-12-13 18:14:49,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 18:14:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 185914 states and 193842 transitions. [2022-12-13 18:14:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-12-13 18:14:49,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:49,155 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2022-12-13 18:14:49,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 18:14:49,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 18:14:49,356 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:49,357 INFO L85 PathProgramCache]: Analyzing trace with hash -89205084, now seen corresponding path program 1 times [2022-12-13 18:14:49,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:49,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232983893] [2022-12-13 18:14:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:49,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 316 proven. 30 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 18:14:50,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:50,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232983893] [2022-12-13 18:14:50,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232983893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:14:50,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790449944] [2022-12-13 18:14:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:50,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:14:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:14:50,114 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:14:50,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 18:14:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:50,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:14:50,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:14:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 398 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-13 18:14:50,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:14:50,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790449944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:50,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:14:50,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 18:14:50,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689754866] [2022-12-13 18:14:50,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:50,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:50,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:50,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:50,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:50,376 INFO L87 Difference]: Start difference. First operand 185914 states and 193842 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 18:14:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:51,685 INFO L93 Difference]: Finished difference Result 451366 states and 470352 transitions. [2022-12-13 18:14:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:51,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 438 [2022-12-13 18:14:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:51,950 INFO L225 Difference]: With dead ends: 451366 [2022-12-13 18:14:51,950 INFO L226 Difference]: Without dead ends: 258942 [2022-12-13 18:14:52,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:14:52,008 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 244 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:52,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 707 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:14:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258942 states. [2022-12-13 18:14:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258942 to 241870. [2022-12-13 18:14:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241870 states, 241869 states have (on average 1.040224253624896) internal successors, (251598), 241869 states have internal predecessors, (251598), 0 states have call successors, (0), 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 18:14:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241870 states to 241870 states and 251598 transitions. [2022-12-13 18:14:55,137 INFO L78 Accepts]: Start accepts. Automaton has 241870 states and 251598 transitions. Word has length 438 [2022-12-13 18:14:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:14:55,138 INFO L495 AbstractCegarLoop]: Abstraction has 241870 states and 251598 transitions. [2022-12-13 18:14:55,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 18:14:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 241870 states and 251598 transitions. [2022-12-13 18:14:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2022-12-13 18:14:55,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:14:55,166 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:55,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 18:14:55,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 18:14:55,368 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:14:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:14:55,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2083046963, now seen corresponding path program 1 times [2022-12-13 18:14:55,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:14:55,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977981253] [2022-12-13 18:14:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:14:55,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:14:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:14:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-12-13 18:14:55,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:14:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977981253] [2022-12-13 18:14:55,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977981253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:14:55,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:14:55,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:14:55,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874143317] [2022-12-13 18:14:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:14:55,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:14:55,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:14:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:14:55,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:14:55,614 INFO L87 Difference]: Start difference. First operand 241870 states and 251598 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 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 18:14:57,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:14:57,241 INFO L93 Difference]: Finished difference Result 482311 states and 501727 transitions. [2022-12-13 18:14:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:14:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 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 439 [2022-12-13 18:14:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:14:57,609 INFO L225 Difference]: With dead ends: 482311 [2022-12-13 18:14:57,609 INFO L226 Difference]: Without dead ends: 241864 [2022-12-13 18:14:57,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:14:57,690 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 205 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:14:57,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 29 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 18:14:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241864 states. [2022-12-13 18:15:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241864 to 241857. [2022-12-13 18:15:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241857 states, 241856 states have (on average 1.0401478565758138) internal successors, (251566), 241856 states have internal predecessors, (251566), 0 states have call successors, (0), 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 18:15:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241857 states to 241857 states and 251566 transitions. [2022-12-13 18:15:00,936 INFO L78 Accepts]: Start accepts. Automaton has 241857 states and 251566 transitions. Word has length 439 [2022-12-13 18:15:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:15:00,936 INFO L495 AbstractCegarLoop]: Abstraction has 241857 states and 251566 transitions. [2022-12-13 18:15:00,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 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 18:15:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 241857 states and 251566 transitions. [2022-12-13 18:15:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-12-13 18:15:00,970 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:15:00,970 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-13 18:15:00,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 18:15:00,970 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:15:00,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:00,971 INFO L85 PathProgramCache]: Analyzing trace with hash 864622115, now seen corresponding path program 1 times [2022-12-13 18:15:00,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:00,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147528054] [2022-12-13 18:15:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:00,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 382 proven. 18 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-13 18:15:01,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:01,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147528054] [2022-12-13 18:15:01,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147528054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:01,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006323067] [2022-12-13 18:15:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:01,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:01,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:01,511 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:01,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 18:15:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:01,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:15:01,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-13 18:15:01,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:15:01,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006323067] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:01,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:15:01,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 18:15:01,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627276086] [2022-12-13 18:15:01,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:01,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:15:01,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:01,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:15:01,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:15:01,894 INFO L87 Difference]: Start difference. First operand 241857 states and 251566 transitions. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 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 18:15:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:15:03,950 INFO L93 Difference]: Finished difference Result 495592 states and 515260 transitions. [2022-12-13 18:15:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:15:03,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 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 441 [2022-12-13 18:15:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:15:04,323 INFO L225 Difference]: With dead ends: 495592 [2022-12-13 18:15:04,323 INFO L226 Difference]: Without dead ends: 254752 [2022-12-13 18:15:04,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:15:04,394 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 453 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:15:04,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 288 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:15:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254752 states. [2022-12-13 18:15:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254752 to 233940. [2022-12-13 18:15:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233940 states, 233939 states have (on average 1.0403481249385524) internal successors, (243378), 233939 states have internal predecessors, (243378), 0 states have call successors, (0), 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 18:15:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233940 states to 233940 states and 243378 transitions. [2022-12-13 18:15:07,462 INFO L78 Accepts]: Start accepts. Automaton has 233940 states and 243378 transitions. Word has length 441 [2022-12-13 18:15:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:15:07,463 INFO L495 AbstractCegarLoop]: Abstraction has 233940 states and 243378 transitions. [2022-12-13 18:15:07,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 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 18:15:07,463 INFO L276 IsEmpty]: Start isEmpty. Operand 233940 states and 243378 transitions. [2022-12-13 18:15:07,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-12-13 18:15:07,498 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:15:07,498 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:15:07,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:07,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:07,700 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:15:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:07,702 INFO L85 PathProgramCache]: Analyzing trace with hash -15458324, now seen corresponding path program 1 times [2022-12-13 18:15:07,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:07,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90093160] [2022-12-13 18:15:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:07,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 399 proven. 157 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 18:15:08,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:08,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90093160] [2022-12-13 18:15:08,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90093160] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:08,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658030561] [2022-12-13 18:15:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:08,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:08,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:08,606 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:08,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 18:15:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 18:15:08,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 415 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:09,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:15:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 415 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:15:11,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658030561] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:15:11,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:15:11,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 13 [2022-12-13 18:15:11,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351300249] [2022-12-13 18:15:11,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:15:11,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 18:15:11,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 18:15:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:15:11,204 INFO L87 Difference]: Start difference. First operand 233940 states and 243378 transitions. Second operand has 13 states, 13 states have (on average 54.69230769230769) internal successors, (711), 13 states have internal predecessors, (711), 0 states have call successors, (0), 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 18:15:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:15:18,625 INFO L93 Difference]: Finished difference Result 600634 states and 627770 transitions. [2022-12-13 18:15:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 18:15:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 54.69230769230769) internal successors, (711), 13 states have internal predecessors, (711), 0 states have call successors, (0), 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 454 [2022-12-13 18:15:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:15:19,140 INFO L225 Difference]: With dead ends: 600634 [2022-12-13 18:15:19,141 INFO L226 Difference]: Without dead ends: 367705 [2022-12-13 18:15:19,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 924 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=1162, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 18:15:19,197 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 4530 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 10202 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4530 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 10789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 10202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:15:19,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4530 Valid, 371 Invalid, 10789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 10202 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-13 18:15:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367705 states. [2022-12-13 18:15:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367705 to 308337. [2022-12-13 18:15:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308337 states, 308336 states have (on average 1.0497444346427274) internal successors, (323674), 308336 states have internal predecessors, (323674), 0 states have call successors, (0), 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 18:15:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308337 states to 308337 states and 323674 transitions. [2022-12-13 18:15:23,802 INFO L78 Accepts]: Start accepts. Automaton has 308337 states and 323674 transitions. Word has length 454 [2022-12-13 18:15:23,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:15:23,802 INFO L495 AbstractCegarLoop]: Abstraction has 308337 states and 323674 transitions. [2022-12-13 18:15:23,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.69230769230769) internal successors, (711), 13 states have internal predecessors, (711), 0 states have call successors, (0), 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 18:15:23,802 INFO L276 IsEmpty]: Start isEmpty. Operand 308337 states and 323674 transitions. [2022-12-13 18:15:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2022-12-13 18:15:23,847 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:15:23,847 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:23,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 18:15:24,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:24,049 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:15:24,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:24,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1563166602, now seen corresponding path program 1 times [2022-12-13 18:15:24,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:24,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414983717] [2022-12-13 18:15:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-12-13 18:15:24,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:24,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414983717] [2022-12-13 18:15:24,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414983717] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:24,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:15:24,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:15:24,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006230092] [2022-12-13 18:15:24,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:24,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:15:24,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:24,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:15:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:15:24,660 INFO L87 Difference]: Start difference. First operand 308337 states and 323674 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 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 18:15:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:15:26,958 INFO L93 Difference]: Finished difference Result 631535 states and 662916 transitions. [2022-12-13 18:15:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:15:26,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 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 488 [2022-12-13 18:15:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:15:27,327 INFO L225 Difference]: With dead ends: 631535 [2022-12-13 18:15:27,327 INFO L226 Difference]: Without dead ends: 323809 [2022-12-13 18:15:27,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:15:27,437 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 97 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:15:27,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 115 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:15:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323809 states. [2022-12-13 18:15:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323809 to 322388. [2022-12-13 18:15:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322388 states, 322387 states have (on average 1.0491210873887595) internal successors, (338223), 322387 states have internal predecessors, (338223), 0 states have call successors, (0), 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 18:15:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322388 states to 322388 states and 338223 transitions. [2022-12-13 18:15:31,586 INFO L78 Accepts]: Start accepts. Automaton has 322388 states and 338223 transitions. Word has length 488 [2022-12-13 18:15:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:15:31,586 INFO L495 AbstractCegarLoop]: Abstraction has 322388 states and 338223 transitions. [2022-12-13 18:15:31,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 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 18:15:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 322388 states and 338223 transitions. [2022-12-13 18:15:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2022-12-13 18:15:31,631 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:15:31,631 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:15:31,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 18:15:31,632 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:15:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash -660133654, now seen corresponding path program 1 times [2022-12-13 18:15:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:31,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032568808] [2022-12-13 18:15:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 428 proven. 194 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 18:15:32,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:32,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032568808] [2022-12-13 18:15:32,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032568808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:32,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935268140] [2022-12-13 18:15:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:32,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:32,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:32,390 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:32,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 18:15:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:32,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:15:32,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:15:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 586 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-13 18:15:32,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:15:33,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935268140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:33,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:15:33,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-12-13 18:15:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405291373] [2022-12-13 18:15:33,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:33,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:15:33,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:15:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:15:33,002 INFO L87 Difference]: Start difference. First operand 322388 states and 338223 transitions. Second operand has 5 states, 5 states have (on average 82.8) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 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 18:15:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:15:36,532 INFO L93 Difference]: Finished difference Result 923537 states and 969753 transitions. [2022-12-13 18:15:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:15:36,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 82.8) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 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 490 [2022-12-13 18:15:36,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:15:37,322 INFO L225 Difference]: With dead ends: 923537 [2022-12-13 18:15:37,322 INFO L226 Difference]: Without dead ends: 610533 [2022-12-13 18:15:37,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:15:37,434 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 559 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:15:37,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 493 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 18:15:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610533 states. [2022-12-13 18:15:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610533 to 506409. [2022-12-13 18:15:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506409 states, 506408 states have (on average 1.0479455300864124) internal successors, (530688), 506408 states have internal predecessors, (530688), 0 states have call successors, (0), 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 18:15:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506409 states to 506409 states and 530688 transitions. [2022-12-13 18:15:45,408 INFO L78 Accepts]: Start accepts. Automaton has 506409 states and 530688 transitions. Word has length 490 [2022-12-13 18:15:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:15:45,408 INFO L495 AbstractCegarLoop]: Abstraction has 506409 states and 530688 transitions. [2022-12-13 18:15:45,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.8) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 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 18:15:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 506409 states and 530688 transitions. [2022-12-13 18:15:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-12-13 18:15:45,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:15:45,471 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-13 18:15:45,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 18:15:45,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:45,672 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:15:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash 494486952, now seen corresponding path program 1 times [2022-12-13 18:15:45,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:45,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148547943] [2022-12-13 18:15:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-12-13 18:15:46,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:46,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148547943] [2022-12-13 18:15:46,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148547943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:15:46,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:15:46,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:15:46,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841929293] [2022-12-13 18:15:46,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:15:46,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:15:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:15:46,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:15:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:15:46,485 INFO L87 Difference]: Start difference. First operand 506409 states and 530688 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 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 18:15:49,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:15:49,923 INFO L93 Difference]: Finished difference Result 994072 states and 1041841 transitions. [2022-12-13 18:15:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:15:49,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 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 535 [2022-12-13 18:15:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:15:50,637 INFO L225 Difference]: With dead ends: 994072 [2022-12-13 18:15:50,637 INFO L226 Difference]: Without dead ends: 506409 [2022-12-13 18:15:50,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:15:50,840 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 69 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:15:50,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 120 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:15:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506409 states. [2022-12-13 18:15:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506409 to 506409. [2022-12-13 18:15:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506409 states, 506408 states have (on average 1.0479396060093837) internal successors, (530685), 506408 states have internal predecessors, (530685), 0 states have call successors, (0), 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 18:15:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506409 states to 506409 states and 530685 transitions. [2022-12-13 18:15:57,934 INFO L78 Accepts]: Start accepts. Automaton has 506409 states and 530685 transitions. Word has length 535 [2022-12-13 18:15:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:15:57,934 INFO L495 AbstractCegarLoop]: Abstraction has 506409 states and 530685 transitions. [2022-12-13 18:15:57,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 2 states have internal predecessors, (329), 0 states have call successors, (0), 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 18:15:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 506409 states and 530685 transitions. [2022-12-13 18:15:58,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2022-12-13 18:15:58,001 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:15:58,001 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:15:58,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 18:15:58,001 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:15:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:15:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash -281244705, now seen corresponding path program 1 times [2022-12-13 18:15:58,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:15:58,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25792810] [2022-12-13 18:15:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:58,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:15:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:15:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 468 proven. 141 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-12-13 18:15:59,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:15:59,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25792810] [2022-12-13 18:15:59,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25792810] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:15:59,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191883913] [2022-12-13 18:15:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:15:59,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:15:59,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:15:59,886 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:15:59,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 18:16:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:16:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 522 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-12-13 18:16:00,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:16:00,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191883913] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:16:00,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:16:00,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-12-13 18:16:00,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133772987] [2022-12-13 18:16:00,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:16:00,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:16:00,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:16:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:16:00,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:16:00,210 INFO L87 Difference]: Start difference. First operand 506409 states and 530685 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 18:16:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:16:04,105 INFO L93 Difference]: Finished difference Result 1153882 states and 1209599 transitions. [2022-12-13 18:16:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:16:04,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 540 [2022-12-13 18:16:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:16:05,051 INFO L225 Difference]: With dead ends: 1153882 [2022-12-13 18:16:05,051 INFO L226 Difference]: Without dead ends: 648289 [2022-12-13 18:16:05,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:16:05,230 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 223 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:16:05,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 85 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:16:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648289 states. [2022-12-13 18:16:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648289 to 586847. [2022-12-13 18:16:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586847 states, 586846 states have (on average 1.0462949393878462) internal successors, (614014), 586846 states have internal predecessors, (614014), 0 states have call successors, (0), 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 18:16:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586847 states to 586847 states and 614014 transitions. [2022-12-13 18:16:13,633 INFO L78 Accepts]: Start accepts. Automaton has 586847 states and 614014 transitions. Word has length 540 [2022-12-13 18:16:13,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:16:13,633 INFO L495 AbstractCegarLoop]: Abstraction has 586847 states and 614014 transitions. [2022-12-13 18:16:13,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 18:16:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 586847 states and 614014 transitions. [2022-12-13 18:16:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2022-12-13 18:16:13,694 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:16:13,694 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 18:16:13,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 18:16:13,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 18:16:13,896 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:16:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:13,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1493021024, now seen corresponding path program 1 times [2022-12-13 18:16:13,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:16:13,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169973723] [2022-12-13 18:16:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:13,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:16:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 608 proven. 18 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-13 18:16:14,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:16:14,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169973723] [2022-12-13 18:16:14,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169973723] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:16:14,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529845820] [2022-12-13 18:16:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:14,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:14,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:14,666 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:16:14,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a0f59ba-3975-440b-9751-61e0095dcec8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 18:16:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:14,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 18:16:14,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 505 proven. 0 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-12-13 18:16:15,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:16:15,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529845820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:16:15,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:16:15,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-13 18:16:15,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447702712] [2022-12-13 18:16:15,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:16:15,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:16:15,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:16:15,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:16:15,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:16:15,090 INFO L87 Difference]: Start difference. First operand 586847 states and 614014 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 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 18:16:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:16:20,468 INFO L93 Difference]: Finished difference Result 1571927 states and 1643324 transitions. [2022-12-13 18:16:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:16:20,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 2 states have internal predecessors, (319), 0 states have call successors, (0), 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 559 [2022-12-13 18:16:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:16:21,779 INFO L225 Difference]: With dead ends: 1571927 [2022-12-13 18:16:21,779 INFO L226 Difference]: Without dead ends: 986708 [2022-12-13 18:16:21,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:16:21,980 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 160 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:16:21,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 471 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]