./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be --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 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:24:45,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:24:45,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:24:45,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:24:45,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:24:45,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:24:45,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:24:45,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:24:45,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:24:45,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:24:45,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:24:45,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:24:45,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:24:45,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:24:45,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:24:45,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:24:45,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:24:45,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:24:45,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:24:45,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:24:45,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:24:45,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:24:45,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:24:45,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:24:45,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:24:45,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:24:45,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:24:45,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:24:45,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:24:45,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:24:45,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:24:45,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:24:45,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:24:45,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:24:45,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:24:45,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:24:45,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:24:45,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:24:45,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:24:45,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:24:45,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:24:45,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:24:45,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:24:45,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:24:45,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:24:45,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:24:45,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:24:45,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:24:45,539 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:24:45,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:24:45,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:24:45,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:24:45,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:24:45,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:24:45,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:24:45,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:24:45,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:24:45,543 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:24:45,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:24:45,543 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:24:45,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:24:45,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:24:45,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:24:45,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:24:45,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:24:45,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:24:45,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:24:45,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:24:45,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:24:45,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:24:45,546 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:24:45,547 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:24:45,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:24:45,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:24:45,548 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_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13e5ee77a02e52d8ba8ae9f3698472ae34be00d2574eddc823f2c8e804568236 [2021-10-21 20:24:45,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:24:45,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:24:45,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:24:45,917 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:24:45,918 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:24:45,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-21 20:24:46,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/data/1a9e3ce81/940b768279e445cdbc85846f4f5ceb6e/FLAG0530493f9 [2021-10-21 20:24:46,503 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:24:46,505 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2021-10-21 20:24:46,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/data/1a9e3ce81/940b768279e445cdbc85846f4f5ceb6e/FLAG0530493f9 [2021-10-21 20:24:46,879 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/data/1a9e3ce81/940b768279e445cdbc85846f4f5ceb6e [2021-10-21 20:24:46,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:24:46,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:24:46,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:24:46,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:24:46,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:24:46,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:24:46" (1/1) ... [2021-10-21 20:24:46,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217c28bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:46, skipping insertion in model container [2021-10-21 20:24:46,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:24:46" (1/1) ... [2021-10-21 20:24:46,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:24:46,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:24:47,080 WARN L228 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_41d38735-1ca3-47f3-97d2-810c22591199/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-21 20:24:47,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:24:47,135 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:24:47,151 WARN L228 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_41d38735-1ca3-47f3-97d2-810c22591199/sv-benchmarks/c/loop-industry-pattern/nested-3.c[404,417] [2021-10-21 20:24:47,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:24:47,186 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:24:47,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47 WrapperNode [2021-10-21 20:24:47,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:24:47,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:24:47,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:24:47,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:24:47,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (1/1) ... [2021-10-21 20:24:47,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (1/1) ... [2021-10-21 20:24:47,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:24:47,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:24:47,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:24:47,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:24:47,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (1/1) ... [2021-10-21 20:24:47,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (1/1) ... [2021-10-21 20:24:47,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (1/1) ... [2021-10-21 20:24:47,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (1/1) ... [2021-10-21 20:24:47,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (1/1) ... [2021-10-21 20:24:47,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (1/1) ... [2021-10-21 20:24:47,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (1/1) ... [2021-10-21 20:24:47,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:24:47,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:24:47,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:24:47,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:24:47,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (1/1) ... [2021-10-21 20:24:47,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:24:47,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:47,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:24:47,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:24:47,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:24:47,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:24:47,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:24:47,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:24:47,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:24:47,589 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-21 20:24:47,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:24:47 BoogieIcfgContainer [2021-10-21 20:24:47,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:24:47,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:24:47,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:24:47,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:24:47,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:24:46" (1/3) ... [2021-10-21 20:24:47,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bac5c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:24:47, skipping insertion in model container [2021-10-21 20:24:47,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:24:47" (2/3) ... [2021-10-21 20:24:47,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bac5c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:24:47, skipping insertion in model container [2021-10-21 20:24:47,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:24:47" (3/3) ... [2021-10-21 20:24:47,600 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-3.c [2021-10-21 20:24:47,605 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:24:47,606 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:24:47,661 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:24:47,672 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 20:24:47,672 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:24:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 20:24:47,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:47,702 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:47,703 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:47,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash 684167869, now seen corresponding path program 1 times [2021-10-21 20:24:47,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:47,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702076969] [2021-10-21 20:24:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:47,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:48,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:48,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702076969] [2021-10-21 20:24:48,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702076969] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:48,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:48,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:24:48,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486501277] [2021-10-21 20:24:48,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:24:48,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:48,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:24:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:24:48,059 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:48,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:48,130 INFO L93 Difference]: Finished difference Result 29 states and 49 transitions. [2021-10-21 20:24:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:24:48,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-10-21 20:24:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:48,140 INFO L225 Difference]: With dead ends: 29 [2021-10-21 20:24:48,140 INFO L226 Difference]: Without dead ends: 16 [2021-10-21 20:24:48,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:24:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-21 20:24:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-10-21 20:24:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-10-21 20:24:48,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2021-10-21 20:24:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:48,175 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-10-21 20:24:48,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-10-21 20:24:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:24:48,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:48,176 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:48,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:24:48,177 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash 68919620, now seen corresponding path program 1 times [2021-10-21 20:24:48,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:48,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992733390] [2021-10-21 20:24:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:48,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:48,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:48,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992733390] [2021-10-21 20:24:48,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992733390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:48,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564709153] [2021-10-21 20:24:48,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:48,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:48,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:48,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:48,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:24:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:48,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 20:24:48,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:24:48,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564709153] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:48,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:24:48,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-21 20:24:48,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496529415] [2021-10-21 20:24:48,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:24:48,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:48,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:24:48,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:24:48,424 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:48,465 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-10-21 20:24:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:24:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-21 20:24:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:48,468 INFO L225 Difference]: With dead ends: 30 [2021-10-21 20:24:48,468 INFO L226 Difference]: Without dead ends: 19 [2021-10-21 20:24:48,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:24:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-21 20:24:48,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2021-10-21 20:24:48,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-10-21 20:24:48,477 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2021-10-21 20:24:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:48,478 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-10-21 20:24:48,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-10-21 20:24:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:24:48,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:48,480 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:48,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:48,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:48,694 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:48,695 INFO L82 PathProgramCache]: Analyzing trace with hash 68979202, now seen corresponding path program 1 times [2021-10-21 20:24:48,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:48,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067128322] [2021-10-21 20:24:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:48,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:48,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:48,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067128322] [2021-10-21 20:24:48,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067128322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:48,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522192982] [2021-10-21 20:24:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:48,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:48,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:48,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:48,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:24:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:48,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:24:48,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:48,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522192982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:48,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:24:48,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-21 20:24:48,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996304778] [2021-10-21 20:24:48,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:24:48,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:48,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:24:48,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:24:48,968 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:49,005 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-10-21 20:24:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:24:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 12 [2021-10-21 20:24:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:49,007 INFO L225 Difference]: With dead ends: 32 [2021-10-21 20:24:49,007 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 20:24:49,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:24:49,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 20:24:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-21 20:24:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-10-21 20:24:49,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2021-10-21 20:24:49,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:49,012 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-10-21 20:24:49,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-10-21 20:24:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 20:24:49,013 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:49,013 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:49,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:49,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:49,238 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:49,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:49,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2128812571, now seen corresponding path program 2 times [2021-10-21 20:24:49,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:49,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916380385] [2021-10-21 20:24:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:49,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:49,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:49,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916380385] [2021-10-21 20:24:49,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916380385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:49,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700518529] [2021-10-21 20:24:49,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:24:49,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:49,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:49,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:49,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:24:49,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:24:49,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:24:49,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:24:49,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:24:49,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700518529] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:49,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:24:49,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-21 20:24:49,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471474724] [2021-10-21 20:24:49,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:24:49,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:49,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:24:49,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:24:49,484 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:49,596 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-10-21 20:24:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:24:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 15 [2021-10-21 20:24:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:49,598 INFO L225 Difference]: With dead ends: 59 [2021-10-21 20:24:49,598 INFO L226 Difference]: Without dead ends: 44 [2021-10-21 20:24:49,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:24:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-21 20:24:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-10-21 20:24:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-10-21 20:24:49,606 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 15 [2021-10-21 20:24:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:49,607 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-10-21 20:24:49,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-10-21 20:24:49,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 20:24:49,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:49,608 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:49,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:49,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:49,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:49,823 INFO L82 PathProgramCache]: Analyzing trace with hash 25548196, now seen corresponding path program 1 times [2021-10-21 20:24:49,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:49,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139751521] [2021-10-21 20:24:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:49,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:49,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:49,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139751521] [2021-10-21 20:24:49,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139751521] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:49,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152622026] [2021-10-21 20:24:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:49,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:49,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:49,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:24:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:50,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:24:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:50,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152622026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:50,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:24:50,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 20:24:50,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098405134] [2021-10-21 20:24:50,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:24:50,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:50,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:24:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:24:50,082 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:50,138 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2021-10-21 20:24:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:24:50,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 18 [2021-10-21 20:24:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:50,140 INFO L225 Difference]: With dead ends: 94 [2021-10-21 20:24:50,140 INFO L226 Difference]: Without dead ends: 61 [2021-10-21 20:24:50,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:24:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-21 20:24:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-10-21 20:24:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2021-10-21 20:24:50,150 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 18 [2021-10-21 20:24:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:50,151 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2021-10-21 20:24:50,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2021-10-21 20:24:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:24:50,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:50,153 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:50,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:50,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:50,378 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:50,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2073833213, now seen corresponding path program 2 times [2021-10-21 20:24:50,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:50,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141293270] [2021-10-21 20:24:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:50,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:50,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:50,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141293270] [2021-10-21 20:24:50,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141293270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:50,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949547575] [2021-10-21 20:24:50,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:24:50,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:50,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:50,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:50,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:24:50,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:24:50,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:24:50,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:24:50,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 20:24:50,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949547575] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:50,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:24:50,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-10-21 20:24:50,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375671622] [2021-10-21 20:24:50,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:24:50,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:50,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:24:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:50,642 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:50,687 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2021-10-21 20:24:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:24:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 21 [2021-10-21 20:24:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:50,696 INFO L225 Difference]: With dead ends: 119 [2021-10-21 20:24:50,696 INFO L226 Difference]: Without dead ends: 80 [2021-10-21 20:24:50,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:24:50,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-21 20:24:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2021-10-21 20:24:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2021-10-21 20:24:50,723 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 21 [2021-10-21 20:24:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:50,723 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2021-10-21 20:24:50,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2021-10-21 20:24:50,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:24:50,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:50,724 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:50,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-21 20:24:50,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:50,925 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:50,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1062715963, now seen corresponding path program 3 times [2021-10-21 20:24:50,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:50,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7740526] [2021-10-21 20:24:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:50,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:51,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:51,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7740526] [2021-10-21 20:24:51,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7740526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:51,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138896837] [2021-10-21 20:24:51,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:24:51,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:51,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:51,022 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:51,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 20:24:51,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 20:24:51,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:24:51,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 20:24:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 20:24:51,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138896837] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:51,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:24:51,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-10-21 20:24:51,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133879128] [2021-10-21 20:24:51,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:24:51,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:24:51,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:24:51,480 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:51,592 INFO L93 Difference]: Finished difference Result 161 states and 203 transitions. [2021-10-21 20:24:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:24:51,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 21 [2021-10-21 20:24:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:51,597 INFO L225 Difference]: With dead ends: 161 [2021-10-21 20:24:51,597 INFO L226 Difference]: Without dead ends: 159 [2021-10-21 20:24:51,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:24:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-21 20:24:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2021-10-21 20:24:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2621359223300972) internal successors, (130), 103 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-10-21 20:24:51,615 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 21 [2021-10-21 20:24:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:51,616 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-10-21 20:24:51,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-10-21 20:24:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:24:51,617 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:51,617 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:51,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:51,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:51,838 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:51,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:51,839 INFO L82 PathProgramCache]: Analyzing trace with hash 483638269, now seen corresponding path program 1 times [2021-10-21 20:24:51,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:51,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034153207] [2021-10-21 20:24:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:51,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:51,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:51,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034153207] [2021-10-21 20:24:51,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034153207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:51,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348611049] [2021-10-21 20:24:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:51,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:51,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:51,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:51,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 20:24:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:52,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:24:52,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:52,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348611049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:52,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:24:52,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-21 20:24:52,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976737110] [2021-10-21 20:24:52,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:24:52,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:52,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:24:52,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:24:52,090 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:52,206 INFO L93 Difference]: Finished difference Result 223 states and 281 transitions. [2021-10-21 20:24:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:24:52,207 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-21 20:24:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:52,208 INFO L225 Difference]: With dead ends: 223 [2021-10-21 20:24:52,208 INFO L226 Difference]: Without dead ends: 154 [2021-10-21 20:24:52,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:24:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-21 20:24:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2021-10-21 20:24:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.2419354838709677) internal successors, (154), 124 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2021-10-21 20:24:52,235 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 21 [2021-10-21 20:24:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:52,235 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2021-10-21 20:24:52,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:52,235 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2021-10-21 20:24:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:24:52,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:52,236 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:52,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:52,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-21 20:24:52,437 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:52,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:52,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2101787646, now seen corresponding path program 2 times [2021-10-21 20:24:52,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:52,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999957904] [2021-10-21 20:24:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:52,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:52,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:52,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999957904] [2021-10-21 20:24:52,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999957904] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:52,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292099856] [2021-10-21 20:24:52,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:24:52,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:52,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:52,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:52,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 20:24:52,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:24:52,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:24:52,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:24:52,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:24:52,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292099856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:52,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:24:52,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-10-21 20:24:52,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681462714] [2021-10-21 20:24:52,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:24:52,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:52,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:24:52,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:24:52,727 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:52,861 INFO L93 Difference]: Finished difference Result 324 states and 408 transitions. [2021-10-21 20:24:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 20:24:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 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 24 [2021-10-21 20:24:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:52,863 INFO L225 Difference]: With dead ends: 324 [2021-10-21 20:24:52,863 INFO L226 Difference]: Without dead ends: 243 [2021-10-21 20:24:52,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:24:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-10-21 20:24:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 140. [2021-10-21 20:24:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.2374100719424461) internal successors, (172), 139 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:52,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2021-10-21 20:24:52,879 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 24 [2021-10-21 20:24:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:52,879 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2021-10-21 20:24:52,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:52,880 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2021-10-21 20:24:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:24:52,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:52,881 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:52,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:53,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:53,106 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:53,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1847320295, now seen corresponding path program 3 times [2021-10-21 20:24:53,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:53,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666805168] [2021-10-21 20:24:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:53,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:53,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:53,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666805168] [2021-10-21 20:24:53,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666805168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:53,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205120819] [2021-10-21 20:24:53,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:24:53,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:53,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:53,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:53,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 20:24:53,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:24:53,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:24:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:24:53,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-21 20:24:53,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205120819] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:53,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:24:53,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-10-21 20:24:53,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818320709] [2021-10-21 20:24:53,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:24:53,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:53,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:24:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:24:53,377 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:53,431 INFO L93 Difference]: Finished difference Result 265 states and 321 transitions. [2021-10-21 20:24:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:24:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 27 [2021-10-21 20:24:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:53,433 INFO L225 Difference]: With dead ends: 265 [2021-10-21 20:24:53,433 INFO L226 Difference]: Without dead ends: 185 [2021-10-21 20:24:53,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:24:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-21 20:24:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 146. [2021-10-21 20:24:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 145 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 178 transitions. [2021-10-21 20:24:53,455 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 178 transitions. Word has length 27 [2021-10-21 20:24:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:53,457 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 178 transitions. [2021-10-21 20:24:53,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 178 transitions. [2021-10-21 20:24:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 20:24:53,463 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:53,463 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:53,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:53,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 20:24:53,674 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:53,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:53,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1668645725, now seen corresponding path program 4 times [2021-10-21 20:24:53,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:53,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043715007] [2021-10-21 20:24:53,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:53,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:53,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:53,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043715007] [2021-10-21 20:24:53,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043715007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:53,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309900612] [2021-10-21 20:24:53,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:24:53,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:53,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:53,758 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:53,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 20:24:53,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:24:53,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:24:53,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:24:53,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:53,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309900612] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:53,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:24:53,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-21 20:24:53,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509519274] [2021-10-21 20:24:53,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:24:53,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:24:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:53,992 INFO L87 Difference]: Start difference. First operand 146 states and 178 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:54,077 INFO L93 Difference]: Finished difference Result 325 states and 394 transitions. [2021-10-21 20:24:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:24:54,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 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 27 [2021-10-21 20:24:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:54,079 INFO L225 Difference]: With dead ends: 325 [2021-10-21 20:24:54,079 INFO L226 Difference]: Without dead ends: 231 [2021-10-21 20:24:54,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:24:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-10-21 20:24:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2021-10-21 20:24:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.216867469879518) internal successors, (202), 166 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2021-10-21 20:24:54,094 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 27 [2021-10-21 20:24:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:54,095 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2021-10-21 20:24:54,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2021-10-21 20:24:54,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 20:24:54,100 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:54,100 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:54,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:54,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:54,320 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:54,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:54,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1538147426, now seen corresponding path program 5 times [2021-10-21 20:24:54,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:54,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573148787] [2021-10-21 20:24:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:54,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:54,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:54,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573148787] [2021-10-21 20:24:54,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573148787] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:54,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384086453] [2021-10-21 20:24:54,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:24:54,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:54,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:54,427 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:54,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 20:24:54,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-21 20:24:54,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:24:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 20:24:54,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:54,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384086453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:54,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:24:54,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-10-21 20:24:54,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392925986] [2021-10-21 20:24:54,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:24:54,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:24:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:24:54,641 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:54,715 INFO L93 Difference]: Finished difference Result 358 states and 432 transitions. [2021-10-21 20:24:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:54,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 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 30 [2021-10-21 20:24:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:54,717 INFO L225 Difference]: With dead ends: 358 [2021-10-21 20:24:54,717 INFO L226 Difference]: Without dead ends: 252 [2021-10-21 20:24:54,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:24:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-21 20:24:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 188. [2021-10-21 20:24:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.2085561497326203) internal successors, (226), 187 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2021-10-21 20:24:54,735 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 30 [2021-10-21 20:24:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:54,736 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2021-10-21 20:24:54,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2021-10-21 20:24:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 20:24:54,738 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:54,738 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:54,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:54,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:54,958 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash 808724797, now seen corresponding path program 6 times [2021-10-21 20:24:54,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:54,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938308615] [2021-10-21 20:24:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:54,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:24:55,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:55,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938308615] [2021-10-21 20:24:55,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938308615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:55,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409718495] [2021-10-21 20:24:55,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:24:55,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:55,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:55,054 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:55,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 20:24:55,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 20:24:55,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:24:55,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 20:24:55,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-21 20:24:55,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409718495] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:55,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:24:55,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-10-21 20:24:55,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913942655] [2021-10-21 20:24:55,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:24:55,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:24:55,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:24:55,557 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:55,657 INFO L93 Difference]: Finished difference Result 270 states and 322 transitions. [2021-10-21 20:24:55,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:24:55,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 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 33 [2021-10-21 20:24:55,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:55,659 INFO L225 Difference]: With dead ends: 270 [2021-10-21 20:24:55,659 INFO L226 Difference]: Without dead ends: 268 [2021-10-21 20:24:55,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:24:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-10-21 20:24:55,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 188. [2021-10-21 20:24:55,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.2085561497326203) internal successors, (226), 187 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2021-10-21 20:24:55,674 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 33 [2021-10-21 20:24:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:55,674 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2021-10-21 20:24:55,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2021-10-21 20:24:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 20:24:55,675 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:55,675 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:55,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:55,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 20:24:55,895 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:55,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1165631, now seen corresponding path program 1 times [2021-10-21 20:24:55,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:55,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589704804] [2021-10-21 20:24:55,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:55,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-21 20:24:55,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:55,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589704804] [2021-10-21 20:24:55,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589704804] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:24:55,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:24:55,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:24:55,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168025213] [2021-10-21 20:24:55,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:24:55,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:55,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:24:55,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:24:55,949 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:55,967 INFO L93 Difference]: Finished difference Result 307 states and 370 transitions. [2021-10-21 20:24:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:24:55,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 33 [2021-10-21 20:24:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:55,969 INFO L225 Difference]: With dead ends: 307 [2021-10-21 20:24:55,970 INFO L226 Difference]: Without dead ends: 200 [2021-10-21 20:24:55,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:24:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-21 20:24:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2021-10-21 20:24:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.2021857923497268) internal successors, (220), 183 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2021-10-21 20:24:55,990 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 33 [2021-10-21 20:24:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:55,991 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2021-10-21 20:24:55,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2021-10-21 20:24:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-21 20:24:55,993 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:55,993 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:24:55,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 20:24:55,994 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1043308475, now seen corresponding path program 1 times [2021-10-21 20:24:55,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:55,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853873879] [2021-10-21 20:24:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:55,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-21 20:24:56,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:56,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853873879] [2021-10-21 20:24:56,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853873879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:56,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230061364] [2021-10-21 20:24:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:56,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:56,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:56,115 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:56,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 20:24:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:56,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:24:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-10-21 20:24:56,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230061364] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:56,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:24:56,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-10-21 20:24:56,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248933858] [2021-10-21 20:24:56,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 20:24:56,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:56,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:24:56,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:24:56,444 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:56,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:56,523 INFO L93 Difference]: Finished difference Result 383 states and 458 transitions. [2021-10-21 20:24:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:24:56,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 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 63 [2021-10-21 20:24:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:56,525 INFO L225 Difference]: With dead ends: 383 [2021-10-21 20:24:56,525 INFO L226 Difference]: Without dead ends: 269 [2021-10-21 20:24:56,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:24:56,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-10-21 20:24:56,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2021-10-21 20:24:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.196078431372549) internal successors, (244), 204 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 244 transitions. [2021-10-21 20:24:56,543 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 244 transitions. Word has length 63 [2021-10-21 20:24:56,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:56,543 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 244 transitions. [2021-10-21 20:24:56,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 244 transitions. [2021-10-21 20:24:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-21 20:24:56,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:56,545 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:24:56,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:56,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 20:24:56,770 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash -305796463, now seen corresponding path program 2 times [2021-10-21 20:24:56,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:56,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086042045] [2021-10-21 20:24:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:56,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 263 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-21 20:24:56,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:56,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086042045] [2021-10-21 20:24:56,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086042045] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:56,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646559789] [2021-10-21 20:24:56,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:24:56,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:56,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:56,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:56,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 20:24:57,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:24:57,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:24:57,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:24:57,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 263 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-10-21 20:24:57,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646559789] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:57,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:24:57,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-10-21 20:24:57,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797100537] [2021-10-21 20:24:57,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 20:24:57,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:57,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 20:24:57,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:24:57,259 INFO L87 Difference]: Start difference. First operand 205 states and 244 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:57,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:57,352 INFO L93 Difference]: Finished difference Result 416 states and 496 transitions. [2021-10-21 20:24:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:24:57,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 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 69 [2021-10-21 20:24:57,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:57,355 INFO L225 Difference]: With dead ends: 416 [2021-10-21 20:24:57,355 INFO L226 Difference]: Without dead ends: 290 [2021-10-21 20:24:57,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:24:57,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-10-21 20:24:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-10-21 20:24:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.191111111111111) internal successors, (268), 225 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) [2021-10-21 20:24:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 268 transitions. [2021-10-21 20:24:57,374 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 268 transitions. Word has length 69 [2021-10-21 20:24:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:57,374 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 268 transitions. [2021-10-21 20:24:57,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 268 transitions. [2021-10-21 20:24:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-21 20:24:57,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:57,376 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:24:57,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:57,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 20:24:57,602 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:57,603 INFO L82 PathProgramCache]: Analyzing trace with hash 721559429, now seen corresponding path program 3 times [2021-10-21 20:24:57,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:57,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592502423] [2021-10-21 20:24:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:57,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 322 proven. 145 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-10-21 20:24:57,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:57,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592502423] [2021-10-21 20:24:57,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592502423] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:57,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127934680] [2021-10-21 20:24:57,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:24:57,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:57,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:57,743 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:57,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 20:24:57,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 20:24:57,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:24:57,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 20:24:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:24:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 28 proven. 326 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-10-21 20:24:58,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127934680] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:58,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:24:58,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-10-21 20:24:58,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363523268] [2021-10-21 20:24:58,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 20:24:58,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:24:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 20:24:58,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-21 20:24:58,575 INFO L87 Difference]: Start difference. First operand 226 states and 268 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:59,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:24:59,393 INFO L93 Difference]: Finished difference Result 847 states and 1009 transitions. [2021-10-21 20:24:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-21 20:24:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-10-21 20:24:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:24:59,398 INFO L225 Difference]: With dead ends: 847 [2021-10-21 20:24:59,398 INFO L226 Difference]: Without dead ends: 709 [2021-10-21 20:24:59,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 617.3ms TimeCoverageRelationStatistics Valid=585, Invalid=2277, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 20:24:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-10-21 20:24:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 398. [2021-10-21 20:24:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.1914357682619647) internal successors, (473), 397 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 473 transitions. [2021-10-21 20:24:59,437 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 473 transitions. Word has length 75 [2021-10-21 20:24:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:24:59,437 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 473 transitions. [2021-10-21 20:24:59,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:24:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 473 transitions. [2021-10-21 20:24:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-21 20:24:59,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:24:59,439 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:24:59,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:24:59,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 20:24:59,654 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:24:59,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:24:59,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1200974189, now seen corresponding path program 1 times [2021-10-21 20:24:59,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:24:59,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485327632] [2021-10-21 20:24:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:59,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:24:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:24:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 390 proven. 176 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-21 20:24:59,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:24:59,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485327632] [2021-10-21 20:24:59,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485327632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:24:59,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244514507] [2021-10-21 20:24:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:24:59,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:24:59,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:24:59,788 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:24:59,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 20:25:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:00,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 20:25:00,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-21 20:25:00,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244514507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:00,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:00,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-10-21 20:25:00,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327546468] [2021-10-21 20:25:00,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 20:25:00,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 20:25:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:25:00,235 INFO L87 Difference]: Start difference. First operand 398 states and 473 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:00,349 INFO L93 Difference]: Finished difference Result 826 states and 978 transitions. [2021-10-21 20:25:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 20:25:00,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 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 81 [2021-10-21 20:25:00,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:00,353 INFO L225 Difference]: With dead ends: 826 [2021-10-21 20:25:00,353 INFO L226 Difference]: Without dead ends: 525 [2021-10-21 20:25:00,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:25:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-10-21 20:25:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 419. [2021-10-21 20:25:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.1889952153110048) internal successors, (497), 418 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 497 transitions. [2021-10-21 20:25:00,392 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 497 transitions. Word has length 81 [2021-10-21 20:25:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:00,392 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 497 transitions. [2021-10-21 20:25:00,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 497 transitions. [2021-10-21 20:25:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-21 20:25:00,397 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:00,397 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:25:00,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:25:00,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 20:25:00,622 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:00,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:00,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1904992903, now seen corresponding path program 2 times [2021-10-21 20:25:00,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:00,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490554261] [2021-10-21 20:25:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:00,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-10-21 20:25:00,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:00,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490554261] [2021-10-21 20:25:00,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490554261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:00,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886830165] [2021-10-21 20:25:00,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:25:00,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:00,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:00,783 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:00,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 20:25:01,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:25:01,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:25:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:25:01,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 5 proven. 183 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-10-21 20:25:01,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886830165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:01,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:01,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 18 [2021-10-21 20:25:01,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256540094] [2021-10-21 20:25:01,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 20:25:01,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 20:25:01,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-10-21 20:25:01,363 INFO L87 Difference]: Start difference. First operand 419 states and 497 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:01,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:01,739 INFO L93 Difference]: Finished difference Result 1441 states and 1671 transitions. [2021-10-21 20:25:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 20:25:01,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-10-21 20:25:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:01,747 INFO L225 Difference]: With dead ends: 1441 [2021-10-21 20:25:01,747 INFO L226 Difference]: Without dead ends: 1128 [2021-10-21 20:25:01,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2021-10-21 20:25:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-10-21 20:25:01,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 443. [2021-10-21 20:25:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1900452488687783) internal successors, (526), 442 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 526 transitions. [2021-10-21 20:25:01,807 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 526 transitions. Word has length 87 [2021-10-21 20:25:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:01,807 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 526 transitions. [2021-10-21 20:25:01,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 526 transitions. [2021-10-21 20:25:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-21 20:25:01,810 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:01,810 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:25:01,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:25:02,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:02,029 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:02,030 INFO L82 PathProgramCache]: Analyzing trace with hash 900910931, now seen corresponding path program 3 times [2021-10-21 20:25:02,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:02,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437993349] [2021-10-21 20:25:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:02,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-10-21 20:25:02,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:02,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437993349] [2021-10-21 20:25:02,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437993349] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:02,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649882803] [2021-10-21 20:25:02,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:25:02,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:02,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:02,245 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:02,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 20:25:02,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 20:25:02,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:25:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:25:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 37 proven. 539 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-10-21 20:25:03,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649882803] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:03,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:03,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2021-10-21 20:25:03,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363195989] [2021-10-21 20:25:03,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 20:25:03,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 20:25:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-10-21 20:25:03,496 INFO L87 Difference]: Start difference. First operand 443 states and 526 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:05,218 INFO L93 Difference]: Finished difference Result 1399 states and 1602 transitions. [2021-10-21 20:25:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-10-21 20:25:05,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 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 93 [2021-10-21 20:25:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:05,225 INFO L225 Difference]: With dead ends: 1399 [2021-10-21 20:25:05,225 INFO L226 Difference]: Without dead ends: 1068 [2021-10-21 20:25:05,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 1293.5ms TimeCoverageRelationStatistics Valid=1260, Invalid=5220, Unknown=0, NotChecked=0, Total=6480 [2021-10-21 20:25:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-21 20:25:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 488. [2021-10-21 20:25:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.1868583162217659) internal successors, (578), 487 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 578 transitions. [2021-10-21 20:25:05,288 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 578 transitions. Word has length 93 [2021-10-21 20:25:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:05,289 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 578 transitions. [2021-10-21 20:25:05,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 578 transitions. [2021-10-21 20:25:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-21 20:25:05,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:05,291 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 26, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:25:05,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:25:05,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:05,518 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:05,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1378183737, now seen corresponding path program 4 times [2021-10-21 20:25:05,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:05,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677946130] [2021-10-21 20:25:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:05,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 621 proven. 287 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-21 20:25:05,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:05,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677946130] [2021-10-21 20:25:05,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677946130] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:05,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810364345] [2021-10-21 20:25:05,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:25:05,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:05,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:05,721 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:05,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 20:25:06,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:25:06,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:25:06,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 20:25:06,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 881 proven. 55 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-21 20:25:06,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810364345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:06,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:06,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-10-21 20:25:06,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162160843] [2021-10-21 20:25:06,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 20:25:06,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 20:25:06,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 20:25:06,635 INFO L87 Difference]: Start difference. First operand 488 states and 578 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:07,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:07,596 INFO L93 Difference]: Finished difference Result 1518 states and 1756 transitions. [2021-10-21 20:25:07,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 20:25:07,596 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 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 99 [2021-10-21 20:25:07,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:07,602 INFO L225 Difference]: With dead ends: 1518 [2021-10-21 20:25:07,603 INFO L226 Difference]: Without dead ends: 1151 [2021-10-21 20:25:07,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 625.6ms TimeCoverageRelationStatistics Valid=847, Invalid=3059, Unknown=0, NotChecked=0, Total=3906 [2021-10-21 20:25:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-10-21 20:25:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 749. [2021-10-21 20:25:07,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.1470588235294117) internal successors, (858), 748 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 858 transitions. [2021-10-21 20:25:07,696 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 858 transitions. Word has length 99 [2021-10-21 20:25:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:07,697 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 858 transitions. [2021-10-21 20:25:07,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 858 transitions. [2021-10-21 20:25:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-21 20:25:07,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:07,700 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 28, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:25:07,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:25:07,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:07,902 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:07,902 INFO L82 PathProgramCache]: Analyzing trace with hash 198529999, now seen corresponding path program 5 times [2021-10-21 20:25:07,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:07,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079800339] [2021-10-21 20:25:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:07,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-10-21 20:25:08,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:08,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079800339] [2021-10-21 20:25:08,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079800339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:08,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4402200] [2021-10-21 20:25:08,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:25:08,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:08,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:08,104 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:08,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 20:25:08,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-10-21 20:25:08,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:25:08,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 20:25:08,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-10-21 20:25:08,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4402200] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:08,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:08,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-10-21 20:25:08,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022001689] [2021-10-21 20:25:08,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 20:25:08,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:08,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 20:25:08,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:25:08,961 INFO L87 Difference]: Start difference. First operand 749 states and 858 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:09,235 INFO L93 Difference]: Finished difference Result 1843 states and 2077 transitions. [2021-10-21 20:25:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 20:25:09,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-21 20:25:09,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:09,242 INFO L225 Difference]: With dead ends: 1843 [2021-10-21 20:25:09,242 INFO L226 Difference]: Without dead ends: 1229 [2021-10-21 20:25:09,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:25:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-10-21 20:25:09,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 800. [2021-10-21 20:25:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.1476846057571966) internal successors, (917), 799 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 917 transitions. [2021-10-21 20:25:09,347 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 917 transitions. Word has length 105 [2021-10-21 20:25:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:09,347 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 917 transitions. [2021-10-21 20:25:09,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 917 transitions. [2021-10-21 20:25:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-21 20:25:09,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:09,350 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 30, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:25:09,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 20:25:09,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:09,571 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:09,571 INFO L82 PathProgramCache]: Analyzing trace with hash 21201355, now seen corresponding path program 6 times [2021-10-21 20:25:09,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:09,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874451754] [2021-10-21 20:25:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:09,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 802 proven. 376 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-10-21 20:25:09,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:09,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874451754] [2021-10-21 20:25:09,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874451754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:09,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61906012] [2021-10-21 20:25:09,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:25:09,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:09,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:09,797 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:09,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 20:25:10,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 20:25:10,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:25:10,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 20:25:10,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 46 proven. 806 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-10-21 20:25:11,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61906012] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:11,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:11,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2021-10-21 20:25:11,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472405845] [2021-10-21 20:25:11,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 20:25:11,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 20:25:11,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-10-21 20:25:11,076 INFO L87 Difference]: Start difference. First operand 800 states and 917 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:12,489 INFO L93 Difference]: Finished difference Result 2088 states and 2365 transitions. [2021-10-21 20:25:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-21 20:25:12,490 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 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 111 [2021-10-21 20:25:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:12,498 INFO L225 Difference]: With dead ends: 2088 [2021-10-21 20:25:12,498 INFO L226 Difference]: Without dead ends: 1435 [2021-10-21 20:25:12,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 996.8ms TimeCoverageRelationStatistics Valid=1248, Invalid=4758, Unknown=0, NotChecked=0, Total=6006 [2021-10-21 20:25:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-10-21 20:25:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 916. [2021-10-21 20:25:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.146448087431694) internal successors, (1049), 915 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1049 transitions. [2021-10-21 20:25:12,633 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1049 transitions. Word has length 111 [2021-10-21 20:25:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:12,633 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1049 transitions. [2021-10-21 20:25:12,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:12,633 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1049 transitions. [2021-10-21 20:25:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-10-21 20:25:12,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:12,636 INFO L512 BasicCegarLoop]: trace histogram [35, 35, 33, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:25:12,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 20:25:12,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 20:25:12,855 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1574829550, now seen corresponding path program 1 times [2021-10-21 20:25:12,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:12,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865340877] [2021-10-21 20:25:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:12,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 955 proven. 425 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-10-21 20:25:13,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:13,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865340877] [2021-10-21 20:25:13,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865340877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:13,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201661283] [2021-10-21 20:25:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:13,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:13,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:13,178 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:13,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 20:25:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:13,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:25:13,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 955 proven. 425 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-10-21 20:25:13,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201661283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:13,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:13,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-10-21 20:25:13,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148337814] [2021-10-21 20:25:13,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 20:25:13,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:13,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 20:25:13,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-21 20:25:13,925 INFO L87 Difference]: Start difference. First operand 916 states and 1049 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:14,344 INFO L93 Difference]: Finished difference Result 2152 states and 2433 transitions. [2021-10-21 20:25:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 20:25:14,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2021-10-21 20:25:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:14,350 INFO L225 Difference]: With dead ends: 2152 [2021-10-21 20:25:14,351 INFO L226 Difference]: Without dead ends: 1395 [2021-10-21 20:25:14,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-21 20:25:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-10-21 20:25:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 964. [2021-10-21 20:25:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 1.1474558670820354) internal successors, (1105), 963 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1105 transitions. [2021-10-21 20:25:14,480 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1105 transitions. Word has length 120 [2021-10-21 20:25:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:14,481 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1105 transitions. [2021-10-21 20:25:14,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1105 transitions. [2021-10-21 20:25:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-21 20:25:14,483 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:14,483 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 34, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:25:14,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 20:25:14,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 20:25:14,698 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:14,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1504583927, now seen corresponding path program 2 times [2021-10-21 20:25:14,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:14,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994542064] [2021-10-21 20:25:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:14,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-10-21 20:25:14,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:14,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994542064] [2021-10-21 20:25:14,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994542064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:14,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141762781] [2021-10-21 20:25:14,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:25:14,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:14,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:14,962 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:14,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 20:25:15,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:25:15,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:25:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 20:25:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 5 proven. 1449 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2021-10-21 20:25:16,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141762781] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:16,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:16,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 24 [2021-10-21 20:25:16,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775805261] [2021-10-21 20:25:16,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 20:25:16,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 20:25:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-10-21 20:25:16,033 INFO L87 Difference]: Start difference. First operand 964 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:16,608 INFO L93 Difference]: Finished difference Result 2496 states and 2861 transitions. [2021-10-21 20:25:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-21 20:25:16,609 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 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 123 [2021-10-21 20:25:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:16,617 INFO L225 Difference]: With dead ends: 2496 [2021-10-21 20:25:16,618 INFO L226 Difference]: Without dead ends: 1703 [2021-10-21 20:25:16,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=655, Invalid=1151, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 20:25:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-10-21 20:25:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1287. [2021-10-21 20:25:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 1.1632970451010887) internal successors, (1496), 1286 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1496 transitions. [2021-10-21 20:25:16,789 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1496 transitions. Word has length 123 [2021-10-21 20:25:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:16,789 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 1496 transitions. [2021-10-21 20:25:16,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1496 transitions. [2021-10-21 20:25:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-21 20:25:16,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:16,793 INFO L512 BasicCegarLoop]: trace histogram [38, 38, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:25:16,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 20:25:17,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:17,018 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:17,019 INFO L82 PathProgramCache]: Analyzing trace with hash -645031407, now seen corresponding path program 3 times [2021-10-21 20:25:17,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:17,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076709743] [2021-10-21 20:25:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:17,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 1123 proven. 532 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2021-10-21 20:25:17,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:17,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076709743] [2021-10-21 20:25:17,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076709743] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:17,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882880427] [2021-10-21 20:25:17,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:25:17,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:17,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:17,306 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:17,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 20:25:18,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:25:18,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:25:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 20:25:18,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 1127 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2021-10-21 20:25:19,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882880427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:19,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:19,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2021-10-21 20:25:19,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838945327] [2021-10-21 20:25:19,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 20:25:19,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:19,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 20:25:19,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-10-21 20:25:19,219 INFO L87 Difference]: Start difference. First operand 1287 states and 1496 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:21,260 INFO L93 Difference]: Finished difference Result 2996 states and 3458 transitions. [2021-10-21 20:25:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-10-21 20:25:21,261 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-10-21 20:25:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:21,273 INFO L225 Difference]: With dead ends: 2996 [2021-10-21 20:25:21,273 INFO L226 Difference]: Without dead ends: 1896 [2021-10-21 20:25:21,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 1673.5ms TimeCoverageRelationStatistics Valid=1914, Invalid=6458, Unknown=0, NotChecked=0, Total=8372 [2021-10-21 20:25:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-10-21 20:25:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1354. [2021-10-21 20:25:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 1.1574279379157428) internal successors, (1566), 1353 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1566 transitions. [2021-10-21 20:25:21,460 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1566 transitions. Word has length 129 [2021-10-21 20:25:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:21,461 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 1566 transitions. [2021-10-21 20:25:21,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1566 transitions. [2021-10-21 20:25:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-10-21 20:25:21,465 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:21,466 INFO L512 BasicCegarLoop]: trace histogram [60, 60, 57, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-10-21 20:25:21,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 20:25:21,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:21,679 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:21,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1150791729, now seen corresponding path program 4 times [2021-10-21 20:25:21,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:21,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332267873] [2021-10-21 20:25:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:21,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5508 backedges. 2484 proven. 590 refuted. 0 times theorem prover too weak. 2434 trivial. 0 not checked. [2021-10-21 20:25:21,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:21,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332267873] [2021-10-21 20:25:21,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332267873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:21,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209008262] [2021-10-21 20:25:21,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:25:21,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:21,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:21,995 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:22,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 20:25:22,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:25:22,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:25:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 20:25:22,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5508 backedges. 2484 proven. 590 refuted. 0 times theorem prover too weak. 2434 trivial. 0 not checked. [2021-10-21 20:25:23,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209008262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:23,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:23,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-10-21 20:25:23,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739229829] [2021-10-21 20:25:23,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 20:25:23,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 20:25:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-21 20:25:23,276 INFO L87 Difference]: Start difference. First operand 1354 states and 1566 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:23,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:23,610 INFO L93 Difference]: Finished difference Result 3003 states and 3452 transitions. [2021-10-21 20:25:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 20:25:23,610 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-10-21 20:25:23,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:23,617 INFO L225 Difference]: With dead ends: 3003 [2021-10-21 20:25:23,617 INFO L226 Difference]: Without dead ends: 1849 [2021-10-21 20:25:23,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-21 20:25:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-10-21 20:25:23,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1426. [2021-10-21 20:25:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 1.1578947368421053) internal successors, (1650), 1425 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:23,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 1650 transitions. [2021-10-21 20:25:23,792 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 1650 transitions. Word has length 201 [2021-10-21 20:25:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:23,792 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 1650 transitions. [2021-10-21 20:25:23,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 1650 transitions. [2021-10-21 20:25:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-10-21 20:25:23,797 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:23,797 INFO L512 BasicCegarLoop]: trace histogram [63, 63, 60, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-10-21 20:25:23,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-21 20:25:24,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:24,010 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:24,011 INFO L82 PathProgramCache]: Analyzing trace with hash -335372444, now seen corresponding path program 5 times [2021-10-21 20:25:24,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:24,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281319842] [2021-10-21 20:25:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:24,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6066 backedges. 2734 proven. 651 refuted. 0 times theorem prover too weak. 2681 trivial. 0 not checked. [2021-10-21 20:25:24,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:24,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281319842] [2021-10-21 20:25:24,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281319842] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:24,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369225346] [2021-10-21 20:25:24,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:25:24,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:24,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:24,318 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:24,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 20:25:25,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-10-21 20:25:25,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:25:25,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 20:25:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6066 backedges. 2868 proven. 610 refuted. 0 times theorem prover too weak. 2588 trivial. 0 not checked. [2021-10-21 20:25:26,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369225346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:26,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:26,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-10-21 20:25:26,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429117367] [2021-10-21 20:25:26,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-21 20:25:26,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:26,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-21 20:25:26,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 20:25:26,045 INFO L87 Difference]: Start difference. First operand 1426 states and 1650 transitions. Second operand has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 48 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:35,259 INFO L93 Difference]: Finished difference Result 8960 states and 10420 transitions. [2021-10-21 20:25:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 343 states. [2021-10-21 20:25:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 48 states have internal predecessors, (151), 0 states have call successors, (0), 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 210 [2021-10-21 20:25:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:35,289 INFO L225 Difference]: With dead ends: 8960 [2021-10-21 20:25:35,289 INFO L226 Difference]: Without dead ends: 7749 [2021-10-21 20:25:35,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59601 ImplicationChecksByTransitivity, 7412.3ms TimeCoverageRelationStatistics Valid=36106, Invalid=82574, Unknown=0, NotChecked=0, Total=118680 [2021-10-21 20:25:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2021-10-21 20:25:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 4912. [2021-10-21 20:25:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4911 states have (on average 1.093463653023824) internal successors, (5370), 4911 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 5370 transitions. [2021-10-21 20:25:36,112 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 5370 transitions. Word has length 210 [2021-10-21 20:25:36,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:36,112 INFO L470 AbstractCegarLoop]: Abstraction has 4912 states and 5370 transitions. [2021-10-21 20:25:36,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1458333333333335) internal successors, (151), 48 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 5370 transitions. [2021-10-21 20:25:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-10-21 20:25:36,126 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:25:36,127 INFO L512 BasicCegarLoop]: trace histogram [66, 66, 63, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2021-10-21 20:25:36,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 20:25:36,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 20:25:36,350 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:25:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:25:36,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1215260527, now seen corresponding path program 6 times [2021-10-21 20:25:36,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:25:36,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833275533] [2021-10-21 20:25:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:25:36,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:25:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:25:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6651 backedges. 2996 proven. 715 refuted. 0 times theorem prover too weak. 2940 trivial. 0 not checked. [2021-10-21 20:25:36,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:25:36,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833275533] [2021-10-21 20:25:36,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833275533] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:36,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840866947] [2021-10-21 20:25:36,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:25:36,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:25:36,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:25:36,693 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:25:36,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 20:25:37,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 20:25:37,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:25:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 20:25:37,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:25:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6651 backedges. 3068 proven. 1 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2021-10-21 20:25:38,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840866947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:25:38,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:25:38,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2021-10-21 20:25:38,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588685003] [2021-10-21 20:25:38,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 20:25:38,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:25:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 20:25:38,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=613, Unknown=0, NotChecked=0, Total=930 [2021-10-21 20:25:38,053 INFO L87 Difference]: Start difference. First operand 4912 states and 5370 transitions. Second operand has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:25:40,180 INFO L93 Difference]: Finished difference Result 9565 states and 10591 transitions. [2021-10-21 20:25:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-21 20:25:40,181 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 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 219 [2021-10-21 20:25:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:25:40,181 INFO L225 Difference]: With dead ends: 9565 [2021-10-21 20:25:40,181 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:25:40,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 1303.3ms TimeCoverageRelationStatistics Valid=1995, Invalid=4325, Unknown=0, NotChecked=0, Total=6320 [2021-10-21 20:25:40,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:25:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:25:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:25:40,190 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2021-10-21 20:25:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:25:40,191 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:25:40,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:25:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:25:40,191 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:25:40,193 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:25:40,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-21 20:25:40,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 20:25:40,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 20:25:40,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:25:40,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:32:03,770 WARN L207 SmtUtils]: Spent 6.39 m on a formula simplification. DAG size of input: 5334 DAG size of output: 3539 [2021-10-21 20:34:10,916 WARN L207 SmtUtils]: Spent 2.12 m on a formula simplification. DAG size of input: 3421 DAG size of output: 165 [2021-10-21 20:34:10,920 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2021-10-21 20:34:10,921 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 24) the Hoare annotation is: (let ((.cse42 (+ ~last~0 1))) (let ((.cse18 (<= ULTIMATE.start_main_~c~0 (+ 7 ~last~0))) (.cse10 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 12))) (.cse20 (<= ULTIMATE.start_main_~c~0 10)) (.cse16 (= ULTIMATE.start_main_~c~0 0)) (.cse17 (<= 7 ULTIMATE.start_main_~c~0)) (.cse29 (<= ULTIMATE.start_main_~c~0 7)) (.cse30 (<= ULTIMATE.start_main_~c~0 12)) (.cse25 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 11))) (.cse24 (<= ULTIMATE.start_main_~c~0 2)) (.cse6 (<= 2 ULTIMATE.start_main_~c~0)) (.cse13 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 2))) (.cse31 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 5))) (.cse26 (<= 5 ULTIMATE.start_main_~c~0)) (.cse27 (<= ULTIMATE.start_main_~c~0 5)) (.cse22 (<= 12 ULTIMATE.start_main_~c~0)) (.cse35 (<= 11 ULTIMATE.start_main_~c~0)) (.cse38 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 8))) (.cse28 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 4))) (.cse23 (<= 4 ULTIMATE.start_main_~c~0)) (.cse19 (<= 10 ULTIMATE.start_main_~c~0)) (.cse39 (<= ~last~0 17)) (.cse37 (<= ULTIMATE.start_main_~c~0 8)) (.cse21 (<= 8 ULTIMATE.start_main_~c~0)) (.cse3 (= ULTIMATE.start_main_~st~0 1)) (.cse8 (<= 13 ULTIMATE.start_main_~c~0)) (.cse7 (< ULTIMATE.start_main_~c~0 200001)) (.cse14 (<= ULTIMATE.start_main_~c~0 6)) (.cse11 (<= 6 ULTIMATE.start_main_~c~0)) (.cse41 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 6))) (.cse32 (<= 1 ULTIMATE.start_main_~c~0)) (.cse40 (<= ULTIMATE.start_main_~c~0 .cse42)) (.cse33 (<= ULTIMATE.start_main_~c~0 1)) (.cse0 (<= 3 ULTIMATE.start_main_~c~0)) (.cse1 (<= ULTIMATE.start_main_~c~0 3)) (.cse2 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse12 (<= .cse42 ULTIMATE.start_main_~c~0)) (.cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0)) (.cse15 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 3))) (.cse5 (= ULTIMATE.start_main_~b~0 0)) (.cse9 (<= ~last~0 2)) (.cse34 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 9))) (.cse36 (<= 9 ULTIMATE.start_main_~c~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse5 .cse6 .cse7 .cse3 .cse4) (and .cse8 .cse2 .cse7 .cse3 .cse4) (and .cse9 .cse10 .cse2 .cse11 .cse4) (and .cse5 .cse12 .cse6 .cse7 .cse4 .cse13) (and .cse2 .cse14 .cse12 .cse11 .cse4 .cse15) (and .cse2 .cse3 .cse4 .cse16) (and .cse17 .cse9 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 13)) .cse2 .cse4) (and .cse17 .cse5 .cse18 .cse12 .cse7 .cse4) (and .cse18 .cse19 .cse2 .cse12 .cse4 .cse20) (and .cse9 .cse2 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 14)) .cse4 .cse21) (and .cse5 .cse22 .cse9 .cse10 .cse4) (and (<= ULTIMATE.start_main_~c~0 4) .cse2 .cse3 .cse4 .cse23) (and .cse24 .cse2 .cse6 .cse3 .cse4) (and .cse25 .cse26 .cse27 .cse2 .cse12 .cse4) (and .cse19 .cse2 .cse3 .cse4 .cse20) (and .cse17 .cse2 .cse12 .cse28 .cse29 .cse4) (and .cse22 .cse2 .cse30 .cse3 .cse4) (and .cse5 .cse3 .cse4 .cse16) (and .cse26 .cse5 .cse12 .cse7 .cse4 .cse31) (and .cse17 .cse2 .cse29 .cse3 .cse4) (and .cse2 .cse32 .cse33 .cse3 .cse4) (and .cse22 .cse2 .cse12 .cse30 .cse34 .cse4) (and .cse25 .cse5 .cse9 .cse35 .cse4) (and .cse5 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 10)) .cse19 .cse12 .cse7 .cse4) (and .cse9 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 15)) .cse2 .cse4 .cse36) (and .cse24 .cse2 .cse12 .cse6 .cse4 .cse13) (and .cse37 .cse2 .cse12 .cse4 .cse21 .cse31) (and .cse38 .cse39 .cse2 .cse35 .cse12 .cse4) (and .cse26 .cse27 .cse2 .cse3 .cse4) (and (<= ULTIMATE.start_main_~c~0 11) .cse2 .cse35 .cse3 .cse4) (and .cse22 .cse9 .cse2 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 18)) .cse4) (and .cse2 .cse32 .cse12 .cse40 .cse33 .cse4) (and .cse9 .cse2 .cse28 .cse4 .cse23) (and .cse9 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 17)) .cse2 .cse35 .cse4) (and .cse38 .cse5 .cse12 .cse7 .cse4 .cse21) (and .cse39 .cse2 .cse12 .cse40 .cse4 .cse23) (and (<= ULTIMATE.start_main_~c~0 9) .cse2 .cse3 .cse4 .cse36) (and .cse8 .cse2 .cse12 .cse7 .cse4) (and .cse5 .cse12 .cse28 .cse7 .cse4 .cse23) (and (<= ULTIMATE.start_main_~c~0 (+ ~last~0 16)) .cse9 .cse19 .cse2 .cse4) (and .cse39 .cse2 .cse12 .cse4 .cse36 .cse41) (and .cse37 .cse2 .cse3 .cse4 .cse21) (and .cse5 .cse32 .cse33 .cse3 .cse4) (and .cse2 .cse14 .cse11 .cse3 .cse4) (and .cse0 .cse5 .cse12 .cse7 .cse4 .cse15) (and .cse5 .cse8 .cse12 .cse7 .cse4) (and .cse5 .cse14 .cse12 .cse11 .cse4 .cse41) (and .cse5 .cse32 .cse12 .cse40 .cse33 .cse4) (and .cse0 .cse1 .cse2 .cse12 .cse4 .cse15) (and (= ULTIMATE.start_main_~a~0 0) .cse5 .cse9 .cse34 .cse36)))) [2021-10-21 20:34:10,921 INFO L857 garLoopResultBuilder]: For program point L23-4(lines 21 31) no Hoare annotation was computed. [2021-10-21 20:34:10,922 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 20:34:10,922 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 20:34:10,922 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 20:34:10,922 INFO L857 garLoopResultBuilder]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2021-10-21 20:34:10,922 INFO L857 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-10-21 20:34:10,923 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-21 20:34:10,923 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 14) no Hoare annotation was computed. [2021-10-21 20:34:10,923 INFO L853 garLoopResultBuilder]: At program point L12-2(lines 11 31) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and (<= 200000 ULTIMATE.start_main_~c~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~c~0 200001) .cse0) (and (= ULTIMATE.start_main_~b~0 0) .cse0 (= ULTIMATE.start_main_~c~0 0)))) [2021-10-21 20:34:10,923 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 20:34:10,923 INFO L857 garLoopResultBuilder]: For program point L25-1(lines 21 31) no Hoare annotation was computed. [2021-10-21 20:34:10,923 INFO L857 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2021-10-21 20:34:10,924 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 32) no Hoare annotation was computed. [2021-10-21 20:34:10,929 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:34:10,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:34:10 BoogieIcfgContainer [2021-10-21 20:34:10,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:34:10,971 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:34:10,971 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:34:10,972 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:34:10,972 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:24:47" (3/4) ... [2021-10-21 20:34:10,975 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:34:10,986 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-21 20:34:10,987 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 20:34:10,987 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:34:10,987 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:34:11,030 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:34:11,030 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:34:11,031 INFO L168 Benchmark]: Toolchain (without parser) took 564146.90 ms. Allocated memory was 144.7 MB in the beginning and 6.8 GB in the end (delta: 6.7 GB). Free memory was 108.8 MB in the beginning and 3.6 GB in the end (delta: -3.4 GB). Peak memory consumption was 3.2 GB. Max. memory is 16.1 GB. [2021-10-21 20:34:11,032 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory was 42.6 MB in the beginning and 42.6 MB in the end (delta: 45.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:34:11,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.88 ms. Allocated memory is still 144.7 MB. Free memory was 108.8 MB in the beginning and 117.2 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:34:11,033 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.83 ms. Allocated memory is still 144.7 MB. Free memory was 117.2 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:34:11,033 INFO L168 Benchmark]: Boogie Preprocessor took 34.92 ms. Allocated memory is still 144.7 MB. Free memory was 115.6 MB in the beginning and 115.1 MB in the end (delta: 553.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:34:11,033 INFO L168 Benchmark]: RCFGBuilder took 312.66 ms. Allocated memory is still 144.7 MB. Free memory was 114.6 MB in the beginning and 104.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:34:11,034 INFO L168 Benchmark]: TraceAbstraction took 563378.08 ms. Allocated memory was 144.7 MB in the beginning and 6.8 GB in the end (delta: 6.7 GB). Free memory was 104.1 MB in the beginning and 3.6 GB in the end (delta: -3.5 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.1 GB. [2021-10-21 20:34:11,034 INFO L168 Benchmark]: Witness Printer took 58.99 ms. Allocated memory is still 6.8 GB. Free memory was 3.6 GB in the beginning and 3.6 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:34:11,037 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory was 42.6 MB in the beginning and 42.6 MB in the end (delta: 45.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 301.88 ms. Allocated memory is still 144.7 MB. Free memory was 108.8 MB in the beginning and 117.2 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.83 ms. Allocated memory is still 144.7 MB. Free memory was 117.2 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.92 ms. Allocated memory is still 144.7 MB. Free memory was 115.6 MB in the beginning and 115.1 MB in the end (delta: 553.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 312.66 ms. Allocated memory is still 144.7 MB. Free memory was 114.6 MB in the beginning and 104.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 563378.08 ms. Allocated memory was 144.7 MB in the beginning and 6.8 GB in the end (delta: 6.7 GB). Free memory was 104.1 MB in the beginning and 3.6 GB in the end (delta: -3.5 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.1 GB. * Witness Printer took 58.99 ms. Allocated memory is still 6.8 GB. Free memory was 3.6 GB in the beginning and 3.6 GB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 563271.1ms, OverallIterations: 29, TraceHistogramMax: 66, EmptinessCheckTime: 79.8ms, AutomataDifference: 21894.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 510524.9ms, InitialAbstractionConstructionTime: 15.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 437 SDtfs, 3115 SDslu, 934 SDs, 0 SdLazy, 5681 SolverSat, 675 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3475.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3293 GetRequests, 2245 SyntacticMatches, 0 SemanticMatches, 1048 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68769 ImplicationChecksByTransitivity, 15907.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4912occurred in iteration=28, InterpolantAutomatonStates: 1002, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2218.4ms AutomataMinimizationTime, 29 MinimizatonAttempts, 8318 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 1969 NumberOfFragments, 1008 HoareAnnotationTreeSize, 2 FomulaSimplifications, 82151409592358781 FormulaSimplificationTreeSizeReduction, 383384.4ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 512870058090589 FormulaSimplificationTreeSizeReductionInter, 127101.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 295.9ms SsaConstructionTime, 1126.7ms SatisfiabilityAnalysisTime, 13392.9ms InterpolantComputationTime, 4134 NumberOfCodeBlocks, 3536 NumberOfCodeBlocksAsserted, 146 NumberOfCheckSat, 4078 ConstructedInterpolants, 0 QuantifiedInterpolants, 10507 SizeOfPredicates, 57 NumberOfNonLiveVariables, 3487 ConjunctsInSsa, 334 ConjunctsInUnsatCore, 56 InterpolantComputations, 7 PerfectInterpolantSequences, 53187/65946 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (((200000 <= c && 1 == cond) && c < 200001) && b == a) || ((b == 0 && b == a) && c == 0) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((3 <= c && c <= 3) && 1 == cond) && st == 1) && b == a) || ((((b == 0 && 2 <= c) && c < 200001) && st == 1) && b == a)) || ((((13 <= c && 1 == cond) && c < 200001) && st == 1) && b == a)) || ((((last <= 2 && c <= last + 12) && 1 == cond) && 6 <= c) && b == a)) || (((((b == 0 && last + 1 <= c) && 2 <= c) && c < 200001) && b == a) && c <= last + 2)) || (((((1 == cond && c <= 6) && last + 1 <= c) && 6 <= c) && b == a) && c <= last + 3)) || (((1 == cond && st == 1) && b == a) && c == 0)) || ((((7 <= c && last <= 2) && c <= last + 13) && 1 == cond) && b == a)) || (((((7 <= c && b == 0) && c <= 7 + last) && last + 1 <= c) && c < 200001) && b == a)) || (((((c <= 7 + last && 10 <= c) && 1 == cond) && last + 1 <= c) && b == a) && c <= 10)) || ((((last <= 2 && 1 == cond) && c <= last + 14) && b == a) && 8 <= c)) || ((((b == 0 && 12 <= c) && last <= 2) && c <= last + 12) && b == a)) || ((((c <= 4 && 1 == cond) && st == 1) && b == a) && 4 <= c)) || ((((c <= 2 && 1 == cond) && 2 <= c) && st == 1) && b == a)) || (((((c <= last + 11 && 5 <= c) && c <= 5) && 1 == cond) && last + 1 <= c) && b == a)) || ((((10 <= c && 1 == cond) && st == 1) && b == a) && c <= 10)) || (((((7 <= c && 1 == cond) && last + 1 <= c) && c <= last + 4) && c <= 7) && b == a)) || ((((12 <= c && 1 == cond) && c <= 12) && st == 1) && b == a)) || (((b == 0 && st == 1) && b == a) && c == 0)) || (((((5 <= c && b == 0) && last + 1 <= c) && c < 200001) && b == a) && c <= last + 5)) || ((((7 <= c && 1 == cond) && c <= 7) && st == 1) && b == a)) || ((((1 == cond && 1 <= c) && c <= 1) && st == 1) && b == a)) || (((((12 <= c && 1 == cond) && last + 1 <= c) && c <= 12) && c <= last + 9) && b == a)) || ((((c <= last + 11 && b == 0) && last <= 2) && 11 <= c) && b == a)) || (((((b == 0 && c <= last + 10) && 10 <= c) && last + 1 <= c) && c < 200001) && b == a)) || ((((last <= 2 && c <= last + 15) && 1 == cond) && b == a) && 9 <= c)) || (((((c <= 2 && 1 == cond) && last + 1 <= c) && 2 <= c) && b == a) && c <= last + 2)) || (((((c <= 8 && 1 == cond) && last + 1 <= c) && b == a) && 8 <= c) && c <= last + 5)) || (((((c <= last + 8 && last <= 17) && 1 == cond) && 11 <= c) && last + 1 <= c) && b == a)) || ((((5 <= c && c <= 5) && 1 == cond) && st == 1) && b == a)) || ((((c <= 11 && 1 == cond) && 11 <= c) && st == 1) && b == a)) || ((((12 <= c && last <= 2) && 1 == cond) && c <= last + 18) && b == a)) || (((((1 == cond && 1 <= c) && last + 1 <= c) && c <= last + 1) && c <= 1) && b == a)) || ((((last <= 2 && 1 == cond) && c <= last + 4) && b == a) && 4 <= c)) || ((((last <= 2 && c <= last + 17) && 1 == cond) && 11 <= c) && b == a)) || (((((c <= last + 8 && b == 0) && last + 1 <= c) && c < 200001) && b == a) && 8 <= c)) || (((((last <= 17 && 1 == cond) && last + 1 <= c) && c <= last + 1) && b == a) && 4 <= c)) || ((((c <= 9 && 1 == cond) && st == 1) && b == a) && 9 <= c)) || ((((13 <= c && 1 == cond) && last + 1 <= c) && c < 200001) && b == a)) || (((((b == 0 && last + 1 <= c) && c <= last + 4) && c < 200001) && b == a) && 4 <= c)) || ((((c <= last + 16 && last <= 2) && 10 <= c) && 1 == cond) && b == a)) || (((((last <= 17 && 1 == cond) && last + 1 <= c) && b == a) && 9 <= c) && c <= last + 6)) || ((((c <= 8 && 1 == cond) && st == 1) && b == a) && 8 <= c)) || ((((b == 0 && 1 <= c) && c <= 1) && st == 1) && b == a)) || ((((1 == cond && c <= 6) && 6 <= c) && st == 1) && b == a)) || (((((3 <= c && b == 0) && last + 1 <= c) && c < 200001) && b == a) && c <= last + 3)) || ((((b == 0 && 13 <= c) && last + 1 <= c) && c < 200001) && b == a)) || (((((b == 0 && c <= 6) && last + 1 <= c) && 6 <= c) && b == a) && c <= last + 6)) || (((((b == 0 && 1 <= c) && last + 1 <= c) && c <= last + 1) && c <= 1) && b == a)) || (((((3 <= c && c <= 3) && 1 == cond) && last + 1 <= c) && b == a) && c <= last + 3)) || ((((a == 0 && b == 0) && last <= 2) && c <= last + 9) && 9 <= c) RESULT: Ultimate proved your program to be correct! [2021-10-21 20:34:11,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d38735-1ca3-47f3-97d2-810c22591199/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...