./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label21.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label21.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ --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 8333703a084905077dfdc91626516e96efc672999752866d79c2cdfd4b587e43 --- 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-dbf71c6-m [2022-10-17 10:33:08,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:33:08,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:33:08,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:33:08,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:33:08,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:33:08,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:33:08,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:33:08,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:33:08,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:33:08,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:33:08,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:33:08,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:33:08,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:33:08,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:33:08,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:33:08,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:33:08,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:33:08,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:33:08,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:33:08,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:33:08,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:33:08,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:33:08,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:33:08,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:33:08,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:33:08,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:33:08,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:33:08,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:33:08,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:33:08,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:33:08,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:33:08,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:33:08,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:33:08,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:33:08,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:33:08,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:33:08,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:33:08,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:33:08,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:33:08,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:33:08,338 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:33:08,390 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:33:08,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:33:08,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:33:08,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:33:08,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:33:08,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:33:08,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:33:08,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:33:08,395 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:33:08,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:33:08,397 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:33:08,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:33:08,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:33:08,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:33:08,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:33:08,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:33:08,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:33:08,399 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:33:08,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:33:08,400 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:33:08,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:33:08,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:33:08,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:33:08,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:33:08,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:33:08,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:33:08,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:33:08,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:33:08,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:33:08,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:33:08,404 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:33:08,404 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:33:08,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:33:08,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8333703a084905077dfdc91626516e96efc672999752866d79c2cdfd4b587e43 [2022-10-17 10:33:08,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:33:08,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:33:08,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:33:08,782 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:33:08,783 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:33:08,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem18_label21.c [2022-10-17 10:33:08,848 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/data/d621465c0/f235f5d243a9468db967866592569bc4/FLAGb1dc972c2 [2022-10-17 10:33:09,643 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:33:09,644 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/sv-benchmarks/c/eca-rers2012/Problem18_label21.c [2022-10-17 10:33:09,680 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/data/d621465c0/f235f5d243a9468db967866592569bc4/FLAGb1dc972c2 [2022-10-17 10:33:10,173 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/data/d621465c0/f235f5d243a9468db967866592569bc4 [2022-10-17 10:33:10,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:33:10,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:33:10,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:33:10,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:33:10,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:33:10,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:33:10" (1/1) ... [2022-10-17 10:33:10,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55bbd568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:10, skipping insertion in model container [2022-10-17 10:33:10,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:33:10" (1/1) ... [2022-10-17 10:33:10,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:33:10,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:33:10,739 WARN L230 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_51095292-25ab-4102-8141-29e50e09f22c/sv-benchmarks/c/eca-rers2012/Problem18_label21.c[6051,6064] [2022-10-17 10:33:11,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:33:11,721 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:33:11,767 WARN L230 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_51095292-25ab-4102-8141-29e50e09f22c/sv-benchmarks/c/eca-rers2012/Problem18_label21.c[6051,6064] [2022-10-17 10:33:12,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:33:12,333 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:33:12,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12 WrapperNode [2022-10-17 10:33:12,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:33:12,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:33:12,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:33:12,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:33:12,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:12,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:12,775 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2022-10-17 10:33:12,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:33:12,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:33:12,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:33:12,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:33:12,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:12,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:12,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:12,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:12,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:12,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:13,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:13,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:13,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:33:13,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:33:13,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:33:13,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:33:13,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (1/1) ... [2022-10-17 10:33:13,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:33:13,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:33:13,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:33:13,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51095292-25ab-4102-8141-29e50e09f22c/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:33:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:33:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:33:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:33:13,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:33:13,345 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:33:13,347 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:33:17,665 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:33:17,684 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:33:17,684 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:33:17,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:33:17 BoogieIcfgContainer [2022-10-17 10:33:17,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:33:17,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:33:17,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:33:17,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:33:17,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:33:10" (1/3) ... [2022-10-17 10:33:17,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0fc7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:33:17, skipping insertion in model container [2022-10-17 10:33:17,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:33:12" (2/3) ... [2022-10-17 10:33:17,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0fc7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:33:17, skipping insertion in model container [2022-10-17 10:33:17,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:33:17" (3/3) ... [2022-10-17 10:33:17,701 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label21.c [2022-10-17 10:33:17,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:33:17,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:33:17,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:33:17,827 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;@3ee6fc8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:33:17,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:33:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-17 10:33:17,869 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:33:17,870 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] [2022-10-17 10:33:17,871 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:33:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2074400678, now seen corresponding path program 1 times [2022-10-17 10:33:17,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:17,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956769145] [2022-10-17 10:33:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:17,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:33:18,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:18,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956769145] [2022-10-17 10:33:18,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956769145] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:33:18,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:33:18,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:33:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127803934] [2022-10-17 10:33:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:33:18,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:33:18,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:18,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:33:18,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:33:18,724 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:25,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:33:25,535 INFO L93 Difference]: Finished difference Result 2910 states and 5661 transitions. [2022-10-17 10:33:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:33:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2022-10-17 10:33:25,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:33:25,582 INFO L225 Difference]: With dead ends: 2910 [2022-10-17 10:33:25,582 INFO L226 Difference]: Without dead ends: 2080 [2022-10-17 10:33:25,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:33:25,597 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 2117 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3390 mSolverCounterSat, 1774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2117 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 5164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1774 IncrementalHoareTripleChecker+Valid, 3390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:33:25,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2117 Valid, 168 Invalid, 5164 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1774 Valid, 3390 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-10-17 10:33:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2022-10-17 10:33:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2074. [2022-10-17 10:33:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 1.5561987457790643) internal successors, (3226), 2073 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3226 transitions. [2022-10-17 10:33:25,781 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3226 transitions. Word has length 58 [2022-10-17 10:33:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:33:25,783 INFO L495 AbstractCegarLoop]: Abstraction has 2074 states and 3226 transitions. [2022-10-17 10:33:25,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:25,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3226 transitions. [2022-10-17 10:33:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-10-17 10:33:25,797 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:33:25,797 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 10:33:25,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:33:25,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:33:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash 380446875, now seen corresponding path program 1 times [2022-10-17 10:33:25,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:25,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326416317] [2022-10-17 10:33:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-10-17 10:33:26,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:26,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326416317] [2022-10-17 10:33:26,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326416317] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:33:26,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:33:26,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:33:26,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127374906] [2022-10-17 10:33:26,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:33:26,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:33:26,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:26,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:33:26,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:33:26,681 INFO L87 Difference]: Start difference. First operand 2074 states and 3226 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:33:32,129 INFO L93 Difference]: Finished difference Result 6908 states and 10880 transitions. [2022-10-17 10:33:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:33:32,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2022-10-17 10:33:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:33:32,161 INFO L225 Difference]: With dead ends: 6908 [2022-10-17 10:33:32,161 INFO L226 Difference]: Without dead ends: 4836 [2022-10-17 10:33:32,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:33:32,167 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 1924 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4332 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 4960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 4332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:33:32,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1924 Valid, 622 Invalid, 4960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 4332 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-10-17 10:33:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2022-10-17 10:33:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4144. [2022-10-17 10:33:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.3408158339367608) internal successors, (5555), 4143 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5555 transitions. [2022-10-17 10:33:32,295 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5555 transitions. Word has length 218 [2022-10-17 10:33:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:33:32,300 INFO L495 AbstractCegarLoop]: Abstraction has 4144 states and 5555 transitions. [2022-10-17 10:33:32,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5555 transitions. [2022-10-17 10:33:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-10-17 10:33:32,315 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:33:32,317 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-10-17 10:33:32,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:33:32,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:33:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:32,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1862349890, now seen corresponding path program 1 times [2022-10-17 10:33:32,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:32,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267015047] [2022-10-17 10:33:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:32,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:33:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:33:32,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:33:32,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267015047] [2022-10-17 10:33:32,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267015047] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:33:32,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:33:32,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:33:32,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682955117] [2022-10-17 10:33:32,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:33:32,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:33:32,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:33:32,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:33:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:33:32,966 INFO L87 Difference]: Start difference. First operand 4144 states and 5555 transitions. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:33:36,829 INFO L93 Difference]: Finished difference Result 10409 states and 13873 transitions. [2022-10-17 10:33:36,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:33:36,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 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 307 [2022-10-17 10:33:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:33:36,865 INFO L225 Difference]: With dead ends: 10409 [2022-10-17 10:33:36,865 INFO L226 Difference]: Without dead ends: 6214 [2022-10-17 10:33:36,871 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 [2022-10-17 10:33:36,873 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 531 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2590 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 3457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 2590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-10-17 10:33:36,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 636 Invalid, 3457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 2590 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-10-17 10:33:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6214 states. [2022-10-17 10:33:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6214 to 5524. [2022-10-17 10:33:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 1.196270143038204) internal successors, (6607), 5523 states have internal predecessors, (6607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 6607 transitions. [2022-10-17 10:33:37,019 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 6607 transitions. Word has length 307 [2022-10-17 10:33:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:33:37,024 INFO L495 AbstractCegarLoop]: Abstraction has 5524 states and 6607 transitions. [2022-10-17 10:33:37,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:33:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 6607 transitions. [2022-10-17 10:33:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2022-10-17 10:33:37,058 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:33:37,059 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:33:37,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:33:37,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:33:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:33:37,062 INFO L85 PathProgramCache]: Analyzing trace with hash -744205843, now seen corresponding path program 1 times [2022-10-17 10:33:37,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:33:37,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380842012] [2022-10-17 10:33:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:33:37,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:33:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat