./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN --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 c33ca3c6d8158368e2a1c112df44a3cf58b94be2237d2503e259747e7fb3b47e --- 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-6b4ec56 [2022-11-20 11:23:23,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:23:23,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:23:23,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:23:23,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:23:23,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:23:23,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:23:23,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:23:23,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:23:23,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:23:23,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:23:23,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:23:23,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:23:23,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:23:23,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:23:23,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:23:23,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:23:23,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:23:23,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:23:23,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:23:23,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:23:23,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:23:23,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:23:23,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:23:23,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:23:23,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:23:23,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:23:23,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:23:23,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:23:23,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:23:23,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:23:23,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:23:23,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:23:23,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:23:23,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:23:23,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:23:23,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:23:23,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:23:23,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:23:23,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:23:23,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:23:23,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:23:23,283 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:23:23,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:23:23,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:23:23,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:23:23,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:23:23,286 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:23:23,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:23:23,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:23:23,287 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:23:23,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:23:23,288 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:23:23,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:23:23,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:23:23,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:23:23,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:23:23,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:23:23,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:23:23,290 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:23:23,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:23:23,290 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:23:23,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:23:23,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:23:23,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:23:23,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:23:23,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:23:23,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:23:23,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:23:23,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:23:23,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:23:23,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:23:23,293 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:23:23,294 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:23:23,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:23:23,294 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_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c33ca3c6d8158368e2a1c112df44a3cf58b94be2237d2503e259747e7fb3b47e [2022-11-20 11:23:23,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:23:23,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:23:23,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:23:23,621 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:23:23,621 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:23:23,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2012/Problem13_label20.c [2022-11-20 11:23:26,937 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:23:27,510 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:23:27,511 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/sv-benchmarks/c/eca-rers2012/Problem13_label20.c [2022-11-20 11:23:27,548 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/data/6aca3a34b/c3bccbbbd1684efd94f0735343c0db87/FLAG1aae650a9 [2022-11-20 11:23:27,571 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/data/6aca3a34b/c3bccbbbd1684efd94f0735343c0db87 [2022-11-20 11:23:27,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:23:27,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:23:27,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:23:27,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:23:27,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:23:27,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:23:27" (1/1) ... [2022-11-20 11:23:27,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e5841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:27, skipping insertion in model container [2022-11-20 11:23:27,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:23:27" (1/1) ... [2022-11-20 11:23:27,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:23:27,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:23:28,106 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_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/sv-benchmarks/c/eca-rers2012/Problem13_label20.c[7839,7852] [2022-11-20 11:23:29,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:23:29,470 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:23:29,510 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_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/sv-benchmarks/c/eca-rers2012/Problem13_label20.c[7839,7852] [2022-11-20 11:23:30,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:23:30,301 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:23:30,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30 WrapperNode [2022-11-20 11:23:30,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:23:30,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:23:30,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:23:30,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:23:30,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:30,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:31,229 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-11-20 11:23:31,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:23:31,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:23:31,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:23:31,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:23:31,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:31,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:31,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:31,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:31,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:31,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:31,985 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:32,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:32,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:23:32,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:23:32,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:23:32,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:23:32,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (1/1) ... [2022-11-20 11:23:32,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:23:32,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:23:32,268 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:23:32,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:23:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:23:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:23:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:23:32,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:23:32,412 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:23:32,414 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:23:39,910 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:23:39,933 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:23:39,942 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 11:23:39,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:23:39 BoogieIcfgContainer [2022-11-20 11:23:39,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:23:39,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:23:39,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:23:39,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:23:39,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:23:27" (1/3) ... [2022-11-20 11:23:39,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aafe258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:23:39, skipping insertion in model container [2022-11-20 11:23:39,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:23:30" (2/3) ... [2022-11-20 11:23:39,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aafe258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:23:39, skipping insertion in model container [2022-11-20 11:23:39,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:23:39" (3/3) ... [2022-11-20 11:23:39,964 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2022-11-20 11:23:39,991 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:23:39,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:23:40,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:23:40,098 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;@77b2b0de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:23:40,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:23:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:23:40,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:40,122 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] [2022-11-20 11:23:40,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:23:40,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:40,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1246856209, now seen corresponding path program 1 times [2022-11-20 11:23:40,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:23:40,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141268761] [2022-11-20 11:23:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:23:40,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:23:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:23:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:40,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:23:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141268761] [2022-11-20 11:23:40,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141268761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:23:40,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:23:40,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:23:40,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111972365] [2022-11-20 11:23:40,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:23:40,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:23:40,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:23:40,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:23:40,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:23:40,780 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:23:47,917 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2022-11-20 11:23:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:23:47,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-11-20 11:23:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:23:47,948 INFO L225 Difference]: With dead ends: 3082 [2022-11-20 11:23:47,948 INFO L226 Difference]: Without dead ends: 1899 [2022-11-20 11:23:47,957 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 [2022-11-20 11:23:47,961 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 984 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:23:47,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-20 11:23:47,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-11-20 11:23:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2022-11-20 11:23:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2022-11-20 11:23:48,111 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 55 [2022-11-20 11:23:48,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:23:48,112 INFO L495 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2022-11-20 11:23:48,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2022-11-20 11:23:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-20 11:23:48,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:48,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:23:48,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:23:48,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:23:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:48,119 INFO L85 PathProgramCache]: Analyzing trace with hash 11423466, now seen corresponding path program 1 times [2022-11-20 11:23:48,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:23:48,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195230203] [2022-11-20 11:23:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:23:48,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:23:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:23:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:48,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:23:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195230203] [2022-11-20 11:23:48,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195230203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:23:48,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:23:48,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:23:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651421241] [2022-11-20 11:23:48,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:23:48,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:23:48,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:23:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:23:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:23:48,487 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:23:54,756 INFO L93 Difference]: Finished difference Result 5384 states and 9441 transitions. [2022-11-20 11:23:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:23:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2022-11-20 11:23:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:23:54,775 INFO L225 Difference]: With dead ends: 5384 [2022-11-20 11:23:54,775 INFO L226 Difference]: Without dead ends: 3492 [2022-11-20 11:23:54,784 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 [2022-11-20 11:23:54,789 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 922 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:23:54,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1013 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-20 11:23:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2022-11-20 11:23:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3491. [2022-11-20 11:23:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 1.5383954154727795) internal successors, (5369), 3490 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5369 transitions. [2022-11-20 11:23:54,901 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5369 transitions. Word has length 120 [2022-11-20 11:23:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:23:54,905 INFO L495 AbstractCegarLoop]: Abstraction has 3491 states and 5369 transitions. [2022-11-20 11:23:54,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5369 transitions. [2022-11-20 11:23:54,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-20 11:23:54,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:54,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:23:54,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:23:54,924 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:23:54,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:54,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1726181937, now seen corresponding path program 1 times [2022-11-20 11:23:54,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:23:54,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164491182] [2022-11-20 11:23:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:23:54,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:23:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:23:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:55,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:23:55,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164491182] [2022-11-20 11:23:55,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164491182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:23:55,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:23:55,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:23:55,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509426369] [2022-11-20 11:23:55,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:23:55,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:23:55,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:23:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:23:55,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:23:55,312 INFO L87 Difference]: Start difference. First operand 3491 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:01,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:01,116 INFO L93 Difference]: Finished difference Result 10169 states and 15700 transitions. [2022-11-20 11:24:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:01,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2022-11-20 11:24:01,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:01,145 INFO L225 Difference]: With dead ends: 10169 [2022-11-20 11:24:01,146 INFO L226 Difference]: Without dead ends: 6680 [2022-11-20 11:24:01,152 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 [2022-11-20 11:24:01,153 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 977 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:01,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 847 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-20 11:24:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2022-11-20 11:24:01,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6669. [2022-11-20 11:24:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6669 states, 6668 states have (on average 1.375224955008998) internal successors, (9170), 6668 states have internal predecessors, (9170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6669 states to 6669 states and 9170 transitions. [2022-11-20 11:24:01,325 INFO L78 Accepts]: Start accepts. Automaton has 6669 states and 9170 transitions. Word has length 122 [2022-11-20 11:24:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:01,326 INFO L495 AbstractCegarLoop]: Abstraction has 6669 states and 9170 transitions. [2022-11-20 11:24:01,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6669 states and 9170 transitions. [2022-11-20 11:24:01,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-20 11:24:01,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:01,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:01,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:24:01,331 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:01,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2017780899, now seen corresponding path program 1 times [2022-11-20 11:24:01,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:01,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108821276] [2022-11-20 11:24:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:01,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:02,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:02,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108821276] [2022-11-20 11:24:02,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108821276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:02,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:02,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:24:02,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135006038] [2022-11-20 11:24:02,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:02,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:02,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:02,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:02,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:24:02,061 INFO L87 Difference]: Start difference. First operand 6669 states and 9170 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:07,059 INFO L93 Difference]: Finished difference Result 14123 states and 19185 transitions. [2022-11-20 11:24:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2022-11-20 11:24:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:07,087 INFO L225 Difference]: With dead ends: 14123 [2022-11-20 11:24:07,087 INFO L226 Difference]: Without dead ends: 7456 [2022-11-20 11:24:07,094 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 [2022-11-20 11:24:07,096 INFO L413 NwaCegarLoop]: 1086 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:07,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1215 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 11:24:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2022-11-20 11:24:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 7456. [2022-11-20 11:24:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7456 states, 7455 states have (on average 1.3362843729040912) internal successors, (9962), 7455 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7456 states to 7456 states and 9962 transitions. [2022-11-20 11:24:07,268 INFO L78 Accepts]: Start accepts. Automaton has 7456 states and 9962 transitions. Word has length 166 [2022-11-20 11:24:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:07,269 INFO L495 AbstractCegarLoop]: Abstraction has 7456 states and 9962 transitions. [2022-11-20 11:24:07,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:07,270 INFO L276 IsEmpty]: Start isEmpty. Operand 7456 states and 9962 transitions. [2022-11-20 11:24:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-20 11:24:07,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:07,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:07,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:24:07,274 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:07,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:07,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1223344377, now seen corresponding path program 1 times [2022-11-20 11:24:07,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:07,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449155004] [2022-11-20 11:24:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:07,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:07,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:07,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449155004] [2022-11-20 11:24:07,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449155004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:07,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:07,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:24:07,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115282035] [2022-11-20 11:24:07,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:07,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:07,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:07,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:24:07,485 INFO L87 Difference]: Start difference. First operand 7456 states and 9962 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:12,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:12,995 INFO L93 Difference]: Finished difference Result 20416 states and 27798 transitions. [2022-11-20 11:24:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:12,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2022-11-20 11:24:13,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:13,048 INFO L225 Difference]: With dead ends: 20416 [2022-11-20 11:24:13,049 INFO L226 Difference]: Without dead ends: 13749 [2022-11-20 11:24:13,059 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 [2022-11-20 11:24:13,061 INFO L413 NwaCegarLoop]: 1862 mSDtfsCounter, 879 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:13,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 2002 Invalid, 3292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-20 11:24:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13749 states. [2022-11-20 11:24:13,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13749 to 13744. [2022-11-20 11:24:13,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13744 states, 13743 states have (on average 1.2572946227170196) internal successors, (17279), 13743 states have internal predecessors, (17279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13744 states to 13744 states and 17279 transitions. [2022-11-20 11:24:13,441 INFO L78 Accepts]: Start accepts. Automaton has 13744 states and 17279 transitions. Word has length 180 [2022-11-20 11:24:13,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:13,442 INFO L495 AbstractCegarLoop]: Abstraction has 13744 states and 17279 transitions. [2022-11-20 11:24:13,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 13744 states and 17279 transitions. [2022-11-20 11:24:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-11-20 11:24:13,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:13,449 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 11:24:13,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:24:13,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1393067190, now seen corresponding path program 1 times [2022-11-20 11:24:13,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:13,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751177548] [2022-11-20 11:24:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-20 11:24:14,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:14,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751177548] [2022-11-20 11:24:14,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751177548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:14,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:14,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:24:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249505675] [2022-11-20 11:24:14,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:14,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:24:14,095 INFO L87 Difference]: Start difference. First operand 13744 states and 17279 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:19,604 INFO L93 Difference]: Finished difference Result 23552 states and 30332 transitions. [2022-11-20 11:24:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:19,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2022-11-20 11:24:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:19,639 INFO L225 Difference]: With dead ends: 23552 [2022-11-20 11:24:19,639 INFO L226 Difference]: Without dead ends: 12966 [2022-11-20 11:24:19,649 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 [2022-11-20 11:24:19,650 INFO L413 NwaCegarLoop]: 1010 mSDtfsCounter, 726 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:19,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 1189 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2700 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-20 11:24:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12966 states. [2022-11-20 11:24:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12966 to 12957. [2022-11-20 11:24:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12957 states, 12956 states have (on average 1.2713028712565606) internal successors, (16471), 12956 states have internal predecessors, (16471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12957 states to 12957 states and 16471 transitions. [2022-11-20 11:24:19,964 INFO L78 Accepts]: Start accepts. Automaton has 12957 states and 16471 transitions. Word has length 267 [2022-11-20 11:24:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:19,965 INFO L495 AbstractCegarLoop]: Abstraction has 12957 states and 16471 transitions. [2022-11-20 11:24:19,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 12957 states and 16471 transitions. [2022-11-20 11:24:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-11-20 11:24:19,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:19,974 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:19,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:24:19,974 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1586820096, now seen corresponding path program 1 times [2022-11-20 11:24:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:19,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4221195] [2022-11-20 11:24:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-20 11:24:20,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:20,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4221195] [2022-11-20 11:24:20,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4221195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:20,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:20,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:24:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39045382] [2022-11-20 11:24:20,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:20,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:20,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:24:20,396 INFO L87 Difference]: Start difference. First operand 12957 states and 16471 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:26,157 INFO L93 Difference]: Finished difference Result 36153 states and 46429 transitions. [2022-11-20 11:24:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 291 [2022-11-20 11:24:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:26,214 INFO L225 Difference]: With dead ends: 36153 [2022-11-20 11:24:26,215 INFO L226 Difference]: Without dead ends: 23985 [2022-11-20 11:24:26,230 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 [2022-11-20 11:24:26,231 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 890 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:26,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 891 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-20 11:24:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23985 states. [2022-11-20 11:24:26,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23985 to 23189. [2022-11-20 11:24:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23189 states, 23188 states have (on average 1.2129549767120924) internal successors, (28126), 23188 states have internal predecessors, (28126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23189 states to 23189 states and 28126 transitions. [2022-11-20 11:24:26,724 INFO L78 Accepts]: Start accepts. Automaton has 23189 states and 28126 transitions. Word has length 291 [2022-11-20 11:24:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:26,725 INFO L495 AbstractCegarLoop]: Abstraction has 23189 states and 28126 transitions. [2022-11-20 11:24:26,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 23189 states and 28126 transitions. [2022-11-20 11:24:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-11-20 11:24:26,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:26,732 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 11:24:26,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:24:26,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:26,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1534602178, now seen corresponding path program 1 times [2022-11-20 11:24:26,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:26,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641658803] [2022-11-20 11:24:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:26,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 105 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:28,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:28,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641658803] [2022-11-20 11:24:28,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641658803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:28,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230564637] [2022-11-20 11:24:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:28,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:28,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:28,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:28,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:24:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:28,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:24:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-20 11:24:29,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:24:29,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230564637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:29,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:24:29,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-20 11:24:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626101210] [2022-11-20 11:24:29,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:29,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:29,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:29,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:24:29,130 INFO L87 Difference]: Start difference. First operand 23189 states and 28126 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:34,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:34,354 INFO L93 Difference]: Finished difference Result 45587 states and 55457 transitions. [2022-11-20 11:24:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:34,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 296 [2022-11-20 11:24:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:34,399 INFO L225 Difference]: With dead ends: 45587 [2022-11-20 11:24:34,399 INFO L226 Difference]: Without dead ends: 23187 [2022-11-20 11:24:34,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:24:34,421 INFO L413 NwaCegarLoop]: 1361 mSDtfsCounter, 1152 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:34,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 1444 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-20 11:24:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23187 states. [2022-11-20 11:24:34,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23187 to 23186. [2022-11-20 11:24:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23186 states, 23185 states have (on average 1.1656674574078068) internal successors, (27026), 23185 states have internal predecessors, (27026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23186 states to 23186 states and 27026 transitions. [2022-11-20 11:24:34,996 INFO L78 Accepts]: Start accepts. Automaton has 23186 states and 27026 transitions. Word has length 296 [2022-11-20 11:24:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:34,997 INFO L495 AbstractCegarLoop]: Abstraction has 23186 states and 27026 transitions. [2022-11-20 11:24:34,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:34,997 INFO L276 IsEmpty]: Start isEmpty. Operand 23186 states and 27026 transitions. [2022-11-20 11:24:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-11-20 11:24:35,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:35,009 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-20 11:24:35,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:24:35,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:35,216 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:35,218 INFO L85 PathProgramCache]: Analyzing trace with hash 340188005, now seen corresponding path program 1 times [2022-11-20 11:24:35,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:35,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848691369] [2022-11-20 11:24:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:35,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-20 11:24:35,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:35,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848691369] [2022-11-20 11:24:35,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848691369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:35,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:35,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:24:35,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418588858] [2022-11-20 11:24:35,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:35,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:35,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:35,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:24:35,586 INFO L87 Difference]: Start difference. First operand 23186 states and 27026 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 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) [2022-11-20 11:24:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:41,937 INFO L93 Difference]: Finished difference Result 57396 states and 67689 transitions. [2022-11-20 11:24:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 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 346 [2022-11-20 11:24:41,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:41,991 INFO L225 Difference]: With dead ends: 57396 [2022-11-20 11:24:41,991 INFO L226 Difference]: Without dead ends: 34999 [2022-11-20 11:24:42,012 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 [2022-11-20 11:24:42,013 INFO L413 NwaCegarLoop]: 1803 mSDtfsCounter, 808 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 3271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:42,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 1946 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-20 11:24:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34999 states. [2022-11-20 11:24:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34999 to 34208. [2022-11-20 11:24:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34208 states, 34207 states have (on average 1.132253632297483) internal successors, (38731), 34207 states have internal predecessors, (38731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34208 states to 34208 states and 38731 transitions. [2022-11-20 11:24:42,571 INFO L78 Accepts]: Start accepts. Automaton has 34208 states and 38731 transitions. Word has length 346 [2022-11-20 11:24:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:42,572 INFO L495 AbstractCegarLoop]: Abstraction has 34208 states and 38731 transitions. [2022-11-20 11:24:42,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 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) [2022-11-20 11:24:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 34208 states and 38731 transitions. [2022-11-20 11:24:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-11-20 11:24:42,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:42,586 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:42,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:24:42,586 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:42,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1326340775, now seen corresponding path program 1 times [2022-11-20 11:24:42,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:42,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993969633] [2022-11-20 11:24:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:42,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 234 proven. 113 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-20 11:24:44,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993969633] [2022-11-20 11:24:44,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993969633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:44,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633386306] [2022-11-20 11:24:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:44,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:44,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:44,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:44,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:24:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:24:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-20 11:24:45,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:24:45,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633386306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:45,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:24:45,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-20 11:24:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298115046] [2022-11-20 11:24:45,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:45,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:24:45,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:45,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:24:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:24:45,125 INFO L87 Difference]: Start difference. First operand 34208 states and 38731 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:50,211 INFO L93 Difference]: Finished difference Result 67618 states and 76660 transitions. [2022-11-20 11:24:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:24:50,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 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 361 [2022-11-20 11:24:50,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:50,245 INFO L225 Difference]: With dead ends: 67618 [2022-11-20 11:24:50,245 INFO L226 Difference]: Without dead ends: 34199 [2022-11-20 11:24:50,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:24:50,263 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 1076 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:50,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1076 Valid, 814 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 11:24:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34199 states. [2022-11-20 11:24:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34199 to 34198. [2022-11-20 11:24:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34198 states, 34197 states have (on average 1.096704389273913) internal successors, (37504), 34197 states have internal predecessors, (37504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34198 states to 34198 states and 37504 transitions. [2022-11-20 11:24:50,757 INFO L78 Accepts]: Start accepts. Automaton has 34198 states and 37504 transitions. Word has length 361 [2022-11-20 11:24:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:50,758 INFO L495 AbstractCegarLoop]: Abstraction has 34198 states and 37504 transitions. [2022-11-20 11:24:50,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 34198 states and 37504 transitions. [2022-11-20 11:24:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-11-20 11:24:50,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:50,767 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-11-20 11:24:50,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:50,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:24:50,973 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:50,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:50,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1003168422, now seen corresponding path program 1 times [2022-11-20 11:24:50,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:50,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481240585] [2022-11-20 11:24:50,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:50,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-20 11:24:51,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481240585] [2022-11-20 11:24:51,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481240585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:24:51,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:24:51,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:24:51,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574027283] [2022-11-20 11:24:51,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:24:51,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:24:51,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:51,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:24:51,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:24:51,505 INFO L87 Difference]: Start difference. First operand 34198 states and 37504 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:03,072 INFO L93 Difference]: Finished difference Result 119762 states and 131663 transitions. [2022-11-20 11:25:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:25:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 403 [2022-11-20 11:25:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:03,156 INFO L225 Difference]: With dead ends: 119762 [2022-11-20 11:25:03,156 INFO L226 Difference]: Without dead ends: 86353 [2022-11-20 11:25:03,181 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 [2022-11-20 11:25:03,182 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 1703 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 6673 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 7697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 6673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:03,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1703 Valid, 828 Invalid, 7697 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1024 Valid, 6673 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-11-20 11:25:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86353 states. [2022-11-20 11:25:04,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86353 to 83862. [2022-11-20 11:25:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83862 states, 83861 states have (on average 1.0877881255887718) internal successors, (91223), 83861 states have internal predecessors, (91223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83862 states to 83862 states and 91223 transitions. [2022-11-20 11:25:04,479 INFO L78 Accepts]: Start accepts. Automaton has 83862 states and 91223 transitions. Word has length 403 [2022-11-20 11:25:04,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:04,479 INFO L495 AbstractCegarLoop]: Abstraction has 83862 states and 91223 transitions. [2022-11-20 11:25:04,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 83862 states and 91223 transitions. [2022-11-20 11:25:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-11-20 11:25:04,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:04,489 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:25:04,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:25:04,490 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:25:04,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:04,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1995365954, now seen corresponding path program 1 times [2022-11-20 11:25:04,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:04,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048142631] [2022-11-20 11:25:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:04,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 318 proven. 113 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-20 11:25:07,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:07,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048142631] [2022-11-20 11:25:07,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048142631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:25:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756195466] [2022-11-20 11:25:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:07,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:07,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:25:07,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:25:07,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:25:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:07,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:25:07,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-20 11:25:07,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:25:07,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756195466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:25:07,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:25:07,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-20 11:25:07,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420037163] [2022-11-20 11:25:07,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:25:07,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:25:07,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:07,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:25:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:25:07,543 INFO L87 Difference]: Start difference. First operand 83862 states and 91223 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:13,505 INFO L93 Difference]: Finished difference Result 165345 states and 181495 transitions. [2022-11-20 11:25:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:25:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 403 [2022-11-20 11:25:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:13,626 INFO L225 Difference]: With dead ends: 165345 [2022-11-20 11:25:13,626 INFO L226 Difference]: Without dead ends: 93300 [2022-11-20 11:25:13,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:25:13,656 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 1215 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:13,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1215 Valid, 407 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-20 11:25:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93300 states. [2022-11-20 11:25:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93300 to 93300. [2022-11-20 11:25:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93300 states, 93299 states have (on average 1.0913407432019635) internal successors, (101821), 93299 states have internal predecessors, (101821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93300 states to 93300 states and 101821 transitions. [2022-11-20 11:25:15,221 INFO L78 Accepts]: Start accepts. Automaton has 93300 states and 101821 transitions. Word has length 403 [2022-11-20 11:25:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:15,222 INFO L495 AbstractCegarLoop]: Abstraction has 93300 states and 101821 transitions. [2022-11-20 11:25:15,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 93300 states and 101821 transitions. [2022-11-20 11:25:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-11-20 11:25:15,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:15,236 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-11-20 11:25:15,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:25:15,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:25:15,449 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:25:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash -799256936, now seen corresponding path program 1 times [2022-11-20 11:25:15,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:15,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752500581] [2022-11-20 11:25:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:15,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-11-20 11:25:16,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:16,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752500581] [2022-11-20 11:25:16,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752500581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:25:16,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:25:16,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:25:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426869717] [2022-11-20 11:25:16,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:25:16,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:25:16,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:16,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:25:16,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:25:16,434 INFO L87 Difference]: Start difference. First operand 93300 states and 101821 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:22,256 INFO L93 Difference]: Finished difference Result 210232 states and 229001 transitions. [2022-11-20 11:25:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:25:22,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 436 [2022-11-20 11:25:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:22,392 INFO L225 Difference]: With dead ends: 210232 [2022-11-20 11:25:22,392 INFO L226 Difference]: Without dead ends: 117721 [2022-11-20 11:25:22,419 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 [2022-11-20 11:25:22,420 INFO L413 NwaCegarLoop]: 982 mSDtfsCounter, 798 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:22,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 1122 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-20 11:25:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117721 states. [2022-11-20 11:25:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117721 to 115338. [2022-11-20 11:25:24,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115338 states, 115337 states have (on average 1.0818384386623547) internal successors, (124776), 115337 states have internal predecessors, (124776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115338 states to 115338 states and 124776 transitions. [2022-11-20 11:25:24,268 INFO L78 Accepts]: Start accepts. Automaton has 115338 states and 124776 transitions. Word has length 436 [2022-11-20 11:25:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:24,269 INFO L495 AbstractCegarLoop]: Abstraction has 115338 states and 124776 transitions. [2022-11-20 11:25:24,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand 115338 states and 124776 transitions. [2022-11-20 11:25:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-11-20 11:25:24,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:24,288 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:24,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:25:24,288 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:25:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1039192784, now seen corresponding path program 1 times [2022-11-20 11:25:24,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:24,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304745843] [2022-11-20 11:25:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:24,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 403 proven. 113 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-20 11:25:26,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:26,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304745843] [2022-11-20 11:25:26,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304745843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:25:26,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422605391] [2022-11-20 11:25:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:26,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:26,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:25:26,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:25:26,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:25:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:26,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:25:26,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-11-20 11:25:26,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:25:26,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422605391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:25:26,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:25:26,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-20 11:25:26,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879930138] [2022-11-20 11:25:26,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:25:26,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:25:26,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:25:26,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:25:26,836 INFO L87 Difference]: Start difference. First operand 115338 states and 124776 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:32,486 INFO L93 Difference]: Finished difference Result 231465 states and 250350 transitions. [2022-11-20 11:25:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:25:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 446 [2022-11-20 11:25:32,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:32,619 INFO L225 Difference]: With dead ends: 231465 [2022-11-20 11:25:32,619 INFO L226 Difference]: Without dead ends: 116916 [2022-11-20 11:25:32,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:25:32,653 INFO L413 NwaCegarLoop]: 1389 mSDtfsCounter, 983 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:32,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 1473 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-20 11:25:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116916 states. [2022-11-20 11:25:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116916 to 115327. [2022-11-20 11:25:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115327 states, 115326 states have (on average 1.068293359693391) internal successors, (123202), 115326 states have internal predecessors, (123202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115327 states to 115327 states and 123202 transitions. [2022-11-20 11:25:34,647 INFO L78 Accepts]: Start accepts. Automaton has 115327 states and 123202 transitions. Word has length 446 [2022-11-20 11:25:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:34,648 INFO L495 AbstractCegarLoop]: Abstraction has 115327 states and 123202 transitions. [2022-11-20 11:25:34,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:34,649 INFO L276 IsEmpty]: Start isEmpty. Operand 115327 states and 123202 transitions. [2022-11-20 11:25:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2022-11-20 11:25:34,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:34,662 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:34,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:25:34,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:34,869 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:25:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2082277539, now seen corresponding path program 1 times [2022-11-20 11:25:34,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:34,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461099512] [2022-11-20 11:25:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:34,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 439 proven. 113 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-20 11:25:36,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:36,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461099512] [2022-11-20 11:25:36,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461099512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:25:36,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251837035] [2022-11-20 11:25:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:36,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:36,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:25:36,923 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:25:36,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:25:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:25:37,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 459 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-20 11:25:37,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:25:37,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251837035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:25:37,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:25:37,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-20 11:25:37,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311312291] [2022-11-20 11:25:37,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:25:37,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:25:37,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:25:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:25:37,323 INFO L87 Difference]: Start difference. First operand 115327 states and 123202 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:43,513 INFO L93 Difference]: Finished difference Result 254270 states and 272381 transitions. [2022-11-20 11:25:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:25:43,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 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 464 [2022-11-20 11:25:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:43,699 INFO L225 Difference]: With dead ends: 254270 [2022-11-20 11:25:43,699 INFO L226 Difference]: Without dead ends: 139732 [2022-11-20 11:25:43,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:25:43,762 INFO L413 NwaCegarLoop]: 1644 mSDtfsCounter, 843 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:43,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 1762 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-20 11:25:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139732 states. [2022-11-20 11:25:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139732 to 137361. [2022-11-20 11:25:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137361 states, 137360 states have (on average 1.0682440302853815) internal successors, (146734), 137360 states have internal predecessors, (146734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137361 states to 137361 states and 146734 transitions. [2022-11-20 11:25:45,950 INFO L78 Accepts]: Start accepts. Automaton has 137361 states and 146734 transitions. Word has length 464 [2022-11-20 11:25:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:45,951 INFO L495 AbstractCegarLoop]: Abstraction has 137361 states and 146734 transitions. [2022-11-20 11:25:45,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 137361 states and 146734 transitions. [2022-11-20 11:25:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-11-20 11:25:45,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:45,965 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:25:45,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:25:46,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:46,166 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:25:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1628627216, now seen corresponding path program 1 times [2022-11-20 11:25:46,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:46,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499901355] [2022-11-20 11:25:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:46,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2022-11-20 11:25:47,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:47,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499901355] [2022-11-20 11:25:47,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499901355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:25:47,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:25:47,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:25:47,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957032010] [2022-11-20 11:25:47,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:25:47,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:25:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:47,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:25:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:25:47,140 INFO L87 Difference]: Start difference. First operand 137361 states and 146734 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:58,911 INFO L93 Difference]: Finished difference Result 340163 states and 363268 transitions. [2022-11-20 11:25:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:25:58,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 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 486 [2022-11-20 11:25:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:59,163 INFO L225 Difference]: With dead ends: 340163 [2022-11-20 11:25:59,163 INFO L226 Difference]: Without dead ends: 203591 [2022-11-20 11:25:59,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:25:59,215 INFO L413 NwaCegarLoop]: 1480 mSDtfsCounter, 1726 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 7787 mSolverCounterSat, 899 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 8686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 899 IncrementalHoareTripleChecker+Valid, 7787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:59,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1726 Valid, 1727 Invalid, 8686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [899 Valid, 7787 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2022-11-20 11:25:59,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203591 states. [2022-11-20 11:26:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203591 to 197201. [2022-11-20 11:26:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197201 states, 197200 states have (on average 1.0634127789046652) internal successors, (209705), 197200 states have internal predecessors, (209705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197201 states to 197201 states and 209705 transitions. [2022-11-20 11:26:01,973 INFO L78 Accepts]: Start accepts. Automaton has 197201 states and 209705 transitions. Word has length 486 [2022-11-20 11:26:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:01,973 INFO L495 AbstractCegarLoop]: Abstraction has 197201 states and 209705 transitions. [2022-11-20 11:26:01,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 197201 states and 209705 transitions. [2022-11-20 11:26:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2022-11-20 11:26:01,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:01,991 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:01,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:26:01,991 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:26:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash 437757587, now seen corresponding path program 1 times [2022-11-20 11:26:01,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:01,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388089139] [2022-11-20 11:26:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:01,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 512 proven. 113 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-20 11:26:04,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:04,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388089139] [2022-11-20 11:26:04,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388089139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:26:04,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717845773] [2022-11-20 11:26:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:04,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:26:04,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:26:04,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:26:04,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:26:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:04,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:26:04,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 534 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-20 11:26:05,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:26:05,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717845773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:26:05,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:26:05,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-20 11:26:05,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281823334] [2022-11-20 11:26:05,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:26:05,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:26:05,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:05,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:26:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:26:05,116 INFO L87 Difference]: Start difference. First operand 197201 states and 209705 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:10,855 INFO L93 Difference]: Finished difference Result 393597 states and 418503 transitions. [2022-11-20 11:26:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:26:10,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 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 541 [2022-11-20 11:26:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:11,246 INFO L225 Difference]: With dead ends: 393597 [2022-11-20 11:26:11,246 INFO L226 Difference]: Without dead ends: 197185 [2022-11-20 11:26:11,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:26:11,326 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 928 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:11,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 455 Invalid, 3014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-20 11:26:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197185 states. [2022-11-20 11:26:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197185 to 194809. [2022-11-20 11:26:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194809 states, 194808 states have (on average 1.055659931830315) internal successors, (205651), 194808 states have internal predecessors, (205651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194809 states to 194809 states and 205651 transitions. [2022-11-20 11:26:13,979 INFO L78 Accepts]: Start accepts. Automaton has 194809 states and 205651 transitions. Word has length 541 [2022-11-20 11:26:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:13,980 INFO L495 AbstractCegarLoop]: Abstraction has 194809 states and 205651 transitions. [2022-11-20 11:26:13,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 194809 states and 205651 transitions. [2022-11-20 11:26:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2022-11-20 11:26:14,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:14,003 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:14,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:26:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a12be0-2a6c-44b3-a3eb-1e61b1b6ce8c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:26:14,210 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:26:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1767280639, now seen corresponding path program 1 times [2022-11-20 11:26:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:14,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891597950] [2022-11-20 11:26:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:14,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 621 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-11-20 11:26:14,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:14,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891597950] [2022-11-20 11:26:14,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891597950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:26:14,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:26:14,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:26:14,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700093735] [2022-11-20 11:26:14,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:26:14,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:26:14,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:14,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:26:14,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:26:14,554 INFO L87 Difference]: Start difference. First operand 194809 states and 205651 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 2 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)