./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/half.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/half.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt --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 41a31ab8e42c0ba8256484457a81b8567cde71c6 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-12 23:59:04,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-12 23:59:04,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-12 23:59:04,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-12 23:59:04,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-12 23:59:04,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-12 23:59:04,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-12 23:59:04,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-12 23:59:04,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-12 23:59:04,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-12 23:59:04,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-12 23:59:04,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-12 23:59:04,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-12 23:59:04,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-12 23:59:04,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-12 23:59:04,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-12 23:59:04,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-12 23:59:04,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-12 23:59:04,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-12 23:59:04,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-12 23:59:04,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-12 23:59:04,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-12 23:59:04,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-12 23:59:04,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-12 23:59:04,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-12 23:59:04,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-12 23:59:04,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-12 23:59:04,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-12 23:59:04,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-12 23:59:04,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-12 23:59:04,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-12 23:59:04,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-12 23:59:04,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-12 23:59:04,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-12 23:59:04,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-12 23:59:04,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-12 23:59:04,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-12 23:59:04,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-12 23:59:04,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-12 23:59:04,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-12 23:59:04,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-12 23:59:04,300 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-12 23:59:04,351 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-12 23:59:04,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-12 23:59:04,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-12 23:59:04,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-12 23:59:04,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-12 23:59:04,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-12 23:59:04,362 INFO L138 SettingsManager]: * Use SBE=true [2021-10-12 23:59:04,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-12 23:59:04,363 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-12 23:59:04,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-12 23:59:04,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-12 23:59:04,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-12 23:59:04,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-12 23:59:04,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-12 23:59:04,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-12 23:59:04,365 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-12 23:59:04,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-12 23:59:04,366 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-12 23:59:04,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-12 23:59:04,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-12 23:59:04,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-12 23:59:04,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-12 23:59:04,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:04,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-12 23:59:04,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-12 23:59:04,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-12 23:59:04,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-12 23:59:04,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-12 23:59:04,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-12 23:59:04,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-12 23:59:04,370 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_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41a31ab8e42c0ba8256484457a81b8567cde71c6 [2021-10-12 23:59:04,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-12 23:59:04,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-12 23:59:04,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-12 23:59:04,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-12 23:59:04,703 INFO L275 PluginConnector]: CDTParser initialized [2021-10-12 23:59:04,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/loop-new/half.i [2021-10-12 23:59:04,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/data/8bb28fcd6/88f01386f89a48bc8175e639460ddec7/FLAG8ba9fd8a9 [2021-10-12 23:59:05,346 INFO L306 CDTParser]: Found 1 translation units. [2021-10-12 23:59:05,347 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/sv-benchmarks/c/loop-new/half.i [2021-10-12 23:59:05,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/data/8bb28fcd6/88f01386f89a48bc8175e639460ddec7/FLAG8ba9fd8a9 [2021-10-12 23:59:05,703 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/data/8bb28fcd6/88f01386f89a48bc8175e639460ddec7 [2021-10-12 23:59:05,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-12 23:59:05,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-12 23:59:05,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:05,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-12 23:59:05,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-12 23:59:05,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:05,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ccc272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05, skipping insertion in model container [2021-10-12 23:59:05,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:05,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-12 23:59:05,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-12 23:59:05,919 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_1c525500-4b77-4702-aad5-7fd193bc0db8/sv-benchmarks/c/loop-new/half.i[891,904] [2021-10-12 23:59:05,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:05,938 INFO L203 MainTranslator]: Completed pre-run [2021-10-12 23:59:05,950 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_1c525500-4b77-4702-aad5-7fd193bc0db8/sv-benchmarks/c/loop-new/half.i[891,904] [2021-10-12 23:59:05,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:05,967 INFO L208 MainTranslator]: Completed translation [2021-10-12 23:59:05,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05 WrapperNode [2021-10-12 23:59:05,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:05,969 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:05,969 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-12 23:59:05,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-12 23:59:05,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:05,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:05,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:05,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-12 23:59:05,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-12 23:59:06,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-12 23:59:06,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:06,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:06,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:06,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:06,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:06,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:06,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:06,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-12 23:59:06,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-12 23:59:06,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-12 23:59:06,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-12 23:59:06,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (1/1) ... [2021-10-12 23:59:06,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:06,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:06,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:06,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-12 23:59:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-12 23:59:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-12 23:59:06,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-12 23:59:06,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-12 23:59:06,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-12 23:59:06,285 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-12 23:59:06,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:06 BoogieIcfgContainer [2021-10-12 23:59:06,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-12 23:59:06,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-12 23:59:06,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-12 23:59:06,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-12 23:59:06,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:59:05" (1/3) ... [2021-10-12 23:59:06,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315e917e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:06, skipping insertion in model container [2021-10-12 23:59:06,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:05" (2/3) ... [2021-10-12 23:59:06,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315e917e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:06, skipping insertion in model container [2021-10-12 23:59:06,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:06" (3/3) ... [2021-10-12 23:59:06,299 INFO L111 eAbstractionObserver]: Analyzing ICFG half.i [2021-10-12 23:59:06,305 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-12 23:59:06,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-12 23:59:06,365 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-12 23:59:06,375 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-12 23:59:06,375 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-12 23:59:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) 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) [2021-10-12 23:59:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-12 23:59:06,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:06,399 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:06,400 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:06,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:06,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1807274184, now seen corresponding path program 1 times [2021-10-12 23:59:06,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:06,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114949151] [2021-10-12 23:59:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:06,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:06,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:06,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114949151] [2021-10-12 23:59:06,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114949151] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:06,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:06,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-12 23:59:06,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11039318] [2021-10-12 23:59:06,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-12 23:59:06,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:06,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-12 23:59:06,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-12 23:59:06,649 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:06,662 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-10-12 23:59:06,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-12 23:59:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-12 23:59:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:06,672 INFO L225 Difference]: With dead ends: 22 [2021-10-12 23:59:06,673 INFO L226 Difference]: Without dead ends: 10 [2021-10-12 23:59:06,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-12 23:59:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-12 23:59:06,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-12 23:59:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-12 23:59:06,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-10-12 23:59:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:06,708 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-12 23:59:06,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-12 23:59:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-12 23:59:06,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:06,711 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:06,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-12 23:59:06,711 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:06,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1806946483, now seen corresponding path program 1 times [2021-10-12 23:59:06,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:06,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071372446] [2021-10-12 23:59:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:06,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:06,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:06,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071372446] [2021-10-12 23:59:06,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071372446] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:06,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:06,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-12 23:59:06,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727505225] [2021-10-12 23:59:06,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:06,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:06,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:06,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:06,980 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:07,133 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-10-12 23:59:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-12 23:59:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-12 23:59:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:07,136 INFO L225 Difference]: With dead ends: 22 [2021-10-12 23:59:07,137 INFO L226 Difference]: Without dead ends: 16 [2021-10-12 23:59:07,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-12 23:59:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-12 23:59:07,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-10-12 23:59:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-10-12 23:59:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-12 23:59:07,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-10-12 23:59:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:07,146 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-12 23:59:07,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:07,147 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-12 23:59:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-12 23:59:07,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:07,149 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:07,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-12 23:59:07,150 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:07,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash -838413826, now seen corresponding path program 1 times [2021-10-12 23:59:07,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:07,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857026642] [2021-10-12 23:59:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:07,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:07,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:07,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857026642] [2021-10-12 23:59:07,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857026642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:07,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696246369] [2021-10-12 23:59:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:07,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:07,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:07,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:07,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-12 23:59:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:07,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-12 23:59:07,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:07,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696246369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:07,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:07,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-12 23:59:07,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618764348] [2021-10-12 23:59:07,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-12 23:59:07,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-12 23:59:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-12 23:59:07,697 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:07,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:07,778 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-10-12 23:59:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-12 23:59:07,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 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 10 [2021-10-12 23:59:07,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:07,781 INFO L225 Difference]: With dead ends: 27 [2021-10-12 23:59:07,781 INFO L226 Difference]: Without dead ends: 17 [2021-10-12 23:59:07,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-12 23:59:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2021-10-12 23:59:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2021-10-12 23:59:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-12 23:59:07,787 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-10-12 23:59:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:07,787 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-12 23:59:07,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:07,788 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-12 23:59:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-12 23:59:07,788 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:07,788 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:07,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:07,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:07,990 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:07,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:07,991 INFO L82 PathProgramCache]: Analyzing trace with hash -412464941, now seen corresponding path program 2 times [2021-10-12 23:59:07,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:07,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918610664] [2021-10-12 23:59:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:07,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:08,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:08,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918610664] [2021-10-12 23:59:08,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918610664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:08,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104589332] [2021-10-12 23:59:08,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:08,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:08,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:08,129 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:08,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-12 23:59:08,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-12 23:59:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:08,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104589332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:08,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:08,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-12 23:59:08,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483645825] [2021-10-12 23:59:08,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-12 23:59:08,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:08,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-12 23:59:08,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:08,255 INFO L87 Difference]: Start difference. First operand 14 states and 15 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) [2021-10-12 23:59:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:08,277 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-10-12 23:59:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-12 23:59:08,277 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 13 [2021-10-12 23:59:08,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:08,278 INFO L225 Difference]: With dead ends: 24 [2021-10-12 23:59:08,278 INFO L226 Difference]: Without dead ends: 17 [2021-10-12 23:59:08,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-12 23:59:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-10-12 23:59:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2021-10-12 23:59:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-12 23:59:08,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2021-10-12 23:59:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:08,283 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-12 23:59:08,283 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) [2021-10-12 23:59:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-12 23:59:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-12 23:59:08,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:08,284 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:08,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-12 23:59:08,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:08,499 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash -355206639, now seen corresponding path program 1 times [2021-10-12 23:59:08,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:08,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568898649] [2021-10-12 23:59:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:08,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:08,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:08,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568898649] [2021-10-12 23:59:08,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568898649] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:08,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668126187] [2021-10-12 23:59:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:08,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:08,728 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:08,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-12 23:59:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-12 23:59:08,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:09,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668126187] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:09,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:09,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-10-12 23:59:09,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724568001] [2021-10-12 23:59:09,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-12 23:59:09,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:09,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-12 23:59:09,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:09,084 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:09,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:09,241 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-10-12 23:59:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-12 23:59:09,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 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 13 [2021-10-12 23:59:09,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:09,242 INFO L225 Difference]: With dead ends: 28 [2021-10-12 23:59:09,243 INFO L226 Difference]: Without dead ends: 22 [2021-10-12 23:59:09,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-10-12 23:59:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-12 23:59:09,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2021-10-12 23:59:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-12 23:59:09,247 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-10-12 23:59:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:09,247 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-12 23:59:09,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-12 23:59:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-12 23:59:09,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:09,248 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:09,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:09,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:09,468 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:09,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1917533216, now seen corresponding path program 2 times [2021-10-12 23:59:09,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:09,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467770681] [2021-10-12 23:59:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:09,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:09,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:09,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467770681] [2021-10-12 23:59:09,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467770681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:09,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751546998] [2021-10-12 23:59:09,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-12 23:59:09,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:09,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:09,614 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:09,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-12 23:59:09,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-12 23:59:09,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-12 23:59:09,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:09,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751546998] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:09,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:09,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-10-12 23:59:09,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105433575] [2021-10-12 23:59:09,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-12 23:59:09,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-12 23:59:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-12 23:59:09,885 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:10,084 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-10-12 23:59:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-12 23:59:10,085 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 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 16 [2021-10-12 23:59:10,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:10,086 INFO L225 Difference]: With dead ends: 33 [2021-10-12 23:59:10,086 INFO L226 Difference]: Without dead ends: 23 [2021-10-12 23:59:10,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-10-12 23:59:10,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-12 23:59:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-10-12 23:59:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-12 23:59:10,091 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-10-12 23:59:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:10,091 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-12 23:59:10,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,092 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-12 23:59:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-12 23:59:10,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:10,092 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:10,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:10,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:10,320 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash -628001871, now seen corresponding path program 3 times [2021-10-12 23:59:10,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:10,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884029887] [2021-10-12 23:59:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:10,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:10,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884029887] [2021-10-12 23:59:10,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884029887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:10,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957648640] [2021-10-12 23:59:10,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-12 23:59:10,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:10,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:10,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:10,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-12 23:59:10,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-12 23:59:10,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:10,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-12 23:59:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-12 23:59:10,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957648640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:10,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:10,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-10-12 23:59:10,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547345018] [2021-10-12 23:59:10,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-12 23:59:10,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:10,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-12 23:59:10,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-10-12 23:59:10,753 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:10,981 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-10-12 23:59:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-12 23:59:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-10-12 23:59:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:10,982 INFO L225 Difference]: With dead ends: 44 [2021-10-12 23:59:10,983 INFO L226 Difference]: Without dead ends: 37 [2021-10-12 23:59:10,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-10-12 23:59:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-12 23:59:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-10-12 23:59:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-10-12 23:59:10,988 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2021-10-12 23:59:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:10,988 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-10-12 23:59:10,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-10-12 23:59:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-12 23:59:10,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:10,990 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:11,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:11,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:11,190 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:11,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:11,191 INFO L82 PathProgramCache]: Analyzing trace with hash -570743569, now seen corresponding path program 4 times [2021-10-12 23:59:11,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:11,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139243543] [2021-10-12 23:59:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:11,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:11,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:11,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139243543] [2021-10-12 23:59:11,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139243543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:11,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398297725] [2021-10-12 23:59:11,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-12 23:59:11,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:11,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:11,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:11,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-12 23:59:11,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-12 23:59:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-12 23:59:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:11,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398297725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:11,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:11,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-10-12 23:59:11,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116522063] [2021-10-12 23:59:11,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-12 23:59:11,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:11,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-12 23:59:11,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-10-12 23:59:11,897 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:12,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:12,178 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-10-12 23:59:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-12 23:59:12,181 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 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 19 [2021-10-12 23:59:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:12,182 INFO L225 Difference]: With dead ends: 65 [2021-10-12 23:59:12,182 INFO L226 Difference]: Without dead ends: 42 [2021-10-12 23:59:12,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-10-12 23:59:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-12 23:59:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-12 23:59:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2021-10-12 23:59:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-12 23:59:12,189 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 19 [2021-10-12 23:59:12,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:12,190 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-12 23:59:12,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:12,190 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-12 23:59:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-12 23:59:12,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:12,191 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:12,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:12,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:12,410 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash -259832224, now seen corresponding path program 5 times [2021-10-12 23:59:12,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:12,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318534932] [2021-10-12 23:59:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:12,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-12 23:59:12,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:12,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318534932] [2021-10-12 23:59:12,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318534932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:12,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196206786] [2021-10-12 23:59:12,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-12 23:59:12,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:12,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:12,671 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:12,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-12 23:59:12,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-12 23:59:12,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-12 23:59:12,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-12 23:59:12,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196206786] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:12,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:12,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 14 [2021-10-12 23:59:12,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862421513] [2021-10-12 23:59:12,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-12 23:59:12,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:12,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-12 23:59:12,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-12 23:59:12,910 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:12,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:12,976 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-10-12 23:59:12,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-12 23:59:12,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 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 28 [2021-10-12 23:59:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:12,977 INFO L225 Difference]: With dead ends: 55 [2021-10-12 23:59:12,977 INFO L226 Difference]: Without dead ends: 33 [2021-10-12 23:59:12,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-12 23:59:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-12 23:59:12,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-12 23:59:12,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-10-12 23:59:12,983 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2021-10-12 23:59:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:12,984 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-10-12 23:59:12,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-10-12 23:59:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-12 23:59:12,985 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:12,985 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:13,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:13,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-12 23:59:13,212 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:13,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:13,213 INFO L82 PathProgramCache]: Analyzing trace with hash 43646763, now seen corresponding path program 6 times [2021-10-12 23:59:13,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:13,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572649785] [2021-10-12 23:59:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:13,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-12 23:59:13,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:13,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572649785] [2021-10-12 23:59:13,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572649785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:13,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792251087] [2021-10-12 23:59:13,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-12 23:59:13,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-12 23:59:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:13,469 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-12 23:59:13,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-12 23:59:13,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-12 23:59:13,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-12 23:59:13,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-12 23:59:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:14,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792251087] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-12 23:59:14,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-12 23:59:14,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 28 [2021-10-12 23:59:14,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633861674] [2021-10-12 23:59:14,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-12 23:59:14,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-12 23:59:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-10-12 23:59:14,228 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2021-10-12 23:59:14,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:14,725 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-10-12 23:59:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-12 23:59:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) Word has length 31 [2021-10-12 23:59:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:14,726 INFO L225 Difference]: With dead ends: 41 [2021-10-12 23:59:14,726 INFO L226 Difference]: Without dead ends: 0 [2021-10-12 23:59:14,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 632.8ms TimeCoverageRelationStatistics Valid=212, Invalid=1510, Unknown=0, NotChecked=0, Total=1722 [2021-10-12 23:59:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-12 23:59:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-12 23:59:14,727 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) [2021-10-12 23:59:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-12 23:59:14,728 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-10-12 23:59:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:14,728 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-12 23:59:14,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2021-10-12 23:59:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-12 23:59:14,728 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-12 23:59:14,731 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-12 23:59:14,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:14,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-12 23:59:14,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-12 23:59:14,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-12 23:59:14,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-12 23:59:14,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-12 23:59:15,060 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-12 23:59:15,060 INFO L857 garLoopResultBuilder]: For program point L29-2(lines 29 33) no Hoare annotation was computed. [2021-10-12 23:59:15,061 INFO L853 garLoopResultBuilder]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse2 (<= 0 ULTIMATE.start_main_~i~0)) (.cse1 (* 2 ULTIMATE.start_main_~n~0))) (or (and (= ULTIMATE.start_main_~i~0 0) (= ULTIMATE.start_main_~n~0 0)) (let ((.cse0 (+ ULTIMATE.start_main_~i~0 1))) (and (<= .cse0 .cse1) .cse2 (<= .cse1 .cse0) (< ULTIMATE.start_main_~i~0 (+ (* 2 ULTIMATE.start_main_~k~0) 1)))) (and .cse2 (< ULTIMATE.start_main_~n~0 (+ ULTIMATE.start_main_~k~0 1)) (<= .cse1 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 .cse1)))) [2021-10-12 23:59:15,061 INFO L857 garLoopResultBuilder]: For program point L29-4(lines 29 33) no Hoare annotation was computed. [2021-10-12 23:59:15,061 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-12 23:59:15,061 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-12 23:59:15,061 INFO L857 garLoopResultBuilder]: For program point L30(lines 30 32) no Hoare annotation was computed. [2021-10-12 23:59:15,062 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-12 23:59:15,062 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-12 23:59:15,062 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-12 23:59:15,062 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-10-12 23:59:15,062 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-10-12 23:59:15,062 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-10-12 23:59:15,063 INFO L860 garLoopResultBuilder]: At program point L35(lines 24 36) the Hoare annotation is: true [2021-10-12 23:59:15,071 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-12 23:59:15,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 11:59:15 BoogieIcfgContainer [2021-10-12 23:59:15,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-12 23:59:15,094 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-12 23:59:15,094 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-12 23:59:15,094 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-12 23:59:15,095 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:06" (3/4) ... [2021-10-12 23:59:15,098 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-12 23:59:15,109 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-12 23:59:15,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-12 23:59:15,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-12 23:59:15,110 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-12 23:59:15,156 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-12 23:59:15,156 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-12 23:59:15,158 INFO L168 Benchmark]: Toolchain (without parser) took 9450.36 ms. Allocated memory was 96.5 MB in the beginning and 132.1 MB in the end (delta: 35.7 MB). Free memory was 61.0 MB in the beginning and 45.9 MB in the end (delta: 15.1 MB). Peak memory consumption was 50.7 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:15,158 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 66.8 MB in the beginning and 66.7 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:15,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.07 ms. Allocated memory is still 96.5 MB. Free memory was 60.9 MB in the beginning and 71.0 MB in the end (delta: -10.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:15,160 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.47 ms. Allocated memory is still 96.5 MB. Free memory was 71.0 MB in the beginning and 69.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:15,160 INFO L168 Benchmark]: Boogie Preprocessor took 20.31 ms. Allocated memory is still 96.5 MB. Free memory was 69.6 MB in the beginning and 68.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:15,160 INFO L168 Benchmark]: RCFGBuilder took 266.83 ms. Allocated memory is still 96.5 MB. Free memory was 68.5 MB in the beginning and 59.7 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:15,161 INFO L168 Benchmark]: TraceAbstraction took 8804.88 ms. Allocated memory was 96.5 MB in the beginning and 132.1 MB in the end (delta: 35.7 MB). Free memory was 58.9 MB in the beginning and 49.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 45.0 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:15,161 INFO L168 Benchmark]: Witness Printer took 62.28 ms. Allocated memory is still 132.1 MB. Free memory was 49.1 MB in the beginning and 45.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:15,163 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 96.5 MB. Free memory was 66.8 MB in the beginning and 66.7 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.07 ms. Allocated memory is still 96.5 MB. Free memory was 60.9 MB in the beginning and 71.0 MB in the end (delta: -10.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.47 ms. Allocated memory is still 96.5 MB. Free memory was 71.0 MB in the beginning and 69.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.31 ms. Allocated memory is still 96.5 MB. Free memory was 69.6 MB in the beginning and 68.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 266.83 ms. Allocated memory is still 96.5 MB. Free memory was 68.5 MB in the beginning and 59.7 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8804.88 ms. Allocated memory was 96.5 MB in the beginning and 132.1 MB in the end (delta: 35.7 MB). Free memory was 58.9 MB in the beginning and 49.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 45.0 MB. Max. memory is 16.1 GB. * Witness Printer took 62.28 ms. Allocated memory is still 132.1 MB. Free memory was 49.1 MB in the beginning and 45.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 19]: 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, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8707.7ms, OverallIterations: 10, TraceHistogramMax: 8, EmptinessCheckTime: 18.0ms, AutomataDifference: 1771.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 119.1ms, InitialAbstractionConstructionTime: 11.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 68 SDtfs, 163 SDslu, 183 SDs, 0 SdLazy, 1096 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 630.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 284 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1972.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=8, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 55.9ms AutomataMinimizationTime, 10 MinimizatonAttempts, 24 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 16 NumberOfFragments, 54 HoareAnnotationTreeSize, 3 FomulaSimplifications, 294 FormulaSimplificationTreeSizeReduction, 44.2ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 188 FormulaSimplificationTreeSizeReductionInter, 69.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 73.1ms SsaConstructionTime, 382.9ms SatisfiabilityAnalysisTime, 3753.6ms InterpolantComputationTime, 312 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 2258 SizeOfPredicates, 23 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 121/458 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: 29]: Loop Invariant Derived loop invariant: ((i == 0 && n == 0) || (((i + 1 <= 2 * n && 0 <= i) && 2 * n <= i + 1) && i < 2 * k + 1)) || (((0 <= i && n < k + 1) && 2 * n <= i) && i <= 2 * n) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-12 23:59:15,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c525500-4b77-4702-aad5-7fd193bc0db8/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...