./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:04:05,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:04:05,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:04:05,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:04:05,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:04:05,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:04:05,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:04:05,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:04:05,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:04:05,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:04:05,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:04:05,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:04:05,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:04:05,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:04:05,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:04:05,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:04:05,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:04:05,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:04:05,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:04:05,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:04:05,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:04:05,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:04:05,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:04:05,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:04:05,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:04:05,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:04:05,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:04:05,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:04:05,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:04:05,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:04:05,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:04:05,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:04:05,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:04:05,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:04:05,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:04:05,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:04:05,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:04:05,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:04:05,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:04:05,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:04:05,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:04:05,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:04:05,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:04:05,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:04:05,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:04:05,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:04:05,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:04:05,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:04:05,443 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:04:05,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:04:05,444 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:04:05,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:04:05,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:04:05,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:04:05,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:04:05,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:04:05,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:04:05,447 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:04:05,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:04:05,447 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:04:05,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:04:05,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:04:05,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:04:05,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:04:05,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:04:05,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:04:05,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:04:05,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:04:05,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:04:05,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:04:05,450 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:04:05,451 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:04:05,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:04:05,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:04:05,452 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_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf [2021-10-21 20:04:05,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:04:05,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:04:05,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:04:05,746 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:04:05,746 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:04:05,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loop-simple/nested_4.c [2021-10-21 20:04:05,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/data/f0c791c27/782233de023e49fa9586cfc2a6b681e7/FLAGe0a368a4c [2021-10-21 20:04:06,350 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:04:06,351 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/sv-benchmarks/c/loop-simple/nested_4.c [2021-10-21 20:04:06,362 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/data/f0c791c27/782233de023e49fa9586cfc2a6b681e7/FLAGe0a368a4c [2021-10-21 20:04:06,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/data/f0c791c27/782233de023e49fa9586cfc2a6b681e7 [2021-10-21 20:04:06,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:04:06,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:04:06,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:04:06,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:04:06,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:04:06,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66556020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06, skipping insertion in model container [2021-10-21 20:04:06,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:04:06,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:04:06,902 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_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-10-21 20:04:06,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:04:06,916 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:04:06,933 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_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-10-21 20:04:06,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:04:06,947 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:04:06,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06 WrapperNode [2021-10-21 20:04:06,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:04:06,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:04:06,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:04:06,949 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:04:06,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:04:06,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:04:06,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:04:06,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:04:06,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:06,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:07,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:07,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:07,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:07,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:04:07,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:04:07,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:04:07,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:04:07,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (1/1) ... [2021-10-21 20:04:07,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:04:07,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:07,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:04:07,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:04:07,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:04:07,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:04:07,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:04:07,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:04:07,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:04:07,352 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-21 20:04:07,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:04:07 BoogieIcfgContainer [2021-10-21 20:04:07,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:04:07,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:04:07,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:04:07,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:04:07,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:04:06" (1/3) ... [2021-10-21 20:04:07,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4823dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:04:07, skipping insertion in model container [2021-10-21 20:04:07,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:04:06" (2/3) ... [2021-10-21 20:04:07,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4823dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:04:07, skipping insertion in model container [2021-10-21 20:04:07,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:04:07" (3/3) ... [2021-10-21 20:04:07,363 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2021-10-21 20:04:07,369 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:04:07,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 20:04:07,424 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:04:07,430 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 20:04:07,430 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 20:04:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-21 20:04:07,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:07,447 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-21 20:04:07,448 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:07,454 INFO L82 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2021-10-21 20:04:07,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:07,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682053961] [2021-10-21 20:04:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:07,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:07,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:07,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682053961] [2021-10-21 20:04:07,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682053961] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:07,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:07,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 20:04:07,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289289722] [2021-10-21 20:04:07,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 20:04:07,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:07,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 20:04:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:04:07,654 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:07,670 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2021-10-21 20:04:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 20:04:07,672 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-21 20:04:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:07,680 INFO L225 Difference]: With dead ends: 32 [2021-10-21 20:04:07,681 INFO L226 Difference]: Without dead ends: 13 [2021-10-21 20:04:07,683 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 [2021-10-21 20:04:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-21 20:04:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-21 20:04:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-10-21 20:04:07,719 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2021-10-21 20:04:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:07,719 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-10-21 20:04:07,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-10-21 20:04:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-21 20:04:07,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:07,721 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-21 20:04:07,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:04:07,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2021-10-21 20:04:07,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:07,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744940631] [2021-10-21 20:04:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:07,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:07,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:07,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744940631] [2021-10-21 20:04:07,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744940631] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:07,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:07,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:04:07,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905541887] [2021-10-21 20:04:07,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:04:07,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:04:07,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:04:07,807 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:07,830 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-10-21 20:04:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:04:07,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-10-21 20:04:07,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:07,845 INFO L225 Difference]: With dead ends: 24 [2021-10-21 20:04:07,845 INFO L226 Difference]: Without dead ends: 21 [2021-10-21 20:04:07,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:04:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-21 20:04:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-10-21 20:04:07,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-21 20:04:07,852 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2021-10-21 20:04:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:07,852 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-21 20:04:07,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-21 20:04:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 20:04:07,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:07,854 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:07,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:04:07,855 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:07,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:07,868 INFO L82 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2021-10-21 20:04:07,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:07,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141725497] [2021-10-21 20:04:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:07,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:07,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:07,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141725497] [2021-10-21 20:04:07,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141725497] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:07,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:07,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:04:07,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200859048] [2021-10-21 20:04:07,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:04:07,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:04:07,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:04:07,984 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:08,020 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-10-21 20:04:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:04:08,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-21 20:04:08,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:08,022 INFO L225 Difference]: With dead ends: 31 [2021-10-21 20:04:08,023 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 20:04:08,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:04:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 20:04:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2021-10-21 20:04:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-10-21 20:04:08,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2021-10-21 20:04:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:08,029 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-10-21 20:04:08,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,029 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-10-21 20:04:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:04:08,030 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:08,030 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:08,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:04:08,031 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2021-10-21 20:04:08,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:08,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203695544] [2021-10-21 20:04:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:08,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:08,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:08,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203695544] [2021-10-21 20:04:08,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203695544] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:08,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:08,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:04:08,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185434553] [2021-10-21 20:04:08,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:04:08,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:08,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:04:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:04:08,170 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-10-21 20:04:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:08,192 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-10-21 20:04:08,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:04:08,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) Word has length 11 [2021-10-21 20:04:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:08,194 INFO L225 Difference]: With dead ends: 31 [2021-10-21 20:04:08,201 INFO L226 Difference]: Without dead ends: 19 [2021-10-21 20:04:08,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:04:08,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-21 20:04:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-10-21 20:04:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-10-21 20:04:08,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-10-21 20:04:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:08,208 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-21 20:04:08,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-10-21 20:04:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-10-21 20:04:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 20:04:08,213 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:08,214 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:08,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:04:08,215 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:08,216 INFO L82 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2021-10-21 20:04:08,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:08,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857791357] [2021-10-21 20:04:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:08,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:08,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:08,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857791357] [2021-10-21 20:04:08,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857791357] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:08,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:04:08,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:04:08,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121992988] [2021-10-21 20:04:08,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 20:04:08,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:08,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 20:04:08,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:04:08,287 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:08,302 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-10-21 20:04:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 20:04:08,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-10-21 20:04:08,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:08,304 INFO L225 Difference]: With dead ends: 31 [2021-10-21 20:04:08,304 INFO L226 Difference]: Without dead ends: 18 [2021-10-21 20:04:08,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 20:04:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-21 20:04:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-21 20:04:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2021-10-21 20:04:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-10-21 20:04:08,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2021-10-21 20:04:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:08,311 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-10-21 20:04:08,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-10-21 20:04:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 20:04:08,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:08,312 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:08,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 20:04:08,313 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2021-10-21 20:04:08,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:08,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533565516] [2021-10-21 20:04:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:08,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:08,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:08,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533565516] [2021-10-21 20:04:08,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533565516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:08,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254423809] [2021-10-21 20:04:08,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:08,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:08,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:08,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:08,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:04:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:08,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:04:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:08,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254423809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:08,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:08,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-21 20:04:08,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946960296] [2021-10-21 20:04:08,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:04:08,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:04:08,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:04:08,622 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:08,659 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-10-21 20:04:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:04:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-10-21 20:04:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:08,661 INFO L225 Difference]: With dead ends: 34 [2021-10-21 20:04:08,662 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 20:04:08,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:04:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 20:04:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-10-21 20:04:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-21 20:04:08,667 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2021-10-21 20:04:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:08,668 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-21 20:04:08,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-21 20:04:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 20:04:08,669 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:08,669 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:08,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:08,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 20:04:08,900 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:08,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1763285690, now seen corresponding path program 2 times [2021-10-21 20:04:08,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:08,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973767400] [2021-10-21 20:04:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:08,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 20:04:08,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:08,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973767400] [2021-10-21 20:04:08,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973767400] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:08,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467592768] [2021-10-21 20:04:08,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:04:08,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:08,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:08,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:08,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:04:09,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:04:09,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:04:09,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:04:09,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467592768] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:09,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:09,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-10-21 20:04:09,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577924156] [2021-10-21 20:04:09,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:04:09,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:04:09,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:04:09,117 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:09,224 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-10-21 20:04:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:04:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-21 20:04:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:09,226 INFO L225 Difference]: With dead ends: 57 [2021-10-21 20:04:09,226 INFO L226 Difference]: Without dead ends: 41 [2021-10-21 20:04:09,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-21 20:04:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-21 20:04:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-10-21 20:04:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-10-21 20:04:09,235 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2021-10-21 20:04:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:09,236 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-10-21 20:04:09,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-10-21 20:04:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 20:04:09,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:09,238 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:04:09,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:09,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:09,452 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1745752790, now seen corresponding path program 3 times [2021-10-21 20:04:09,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:09,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884293867] [2021-10-21 20:04:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:09,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-21 20:04:09,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:09,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884293867] [2021-10-21 20:04:09,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884293867] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:09,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504857359] [2021-10-21 20:04:09,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:04:09,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:09,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:09,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:09,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:04:09,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:04:09,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:09,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 20:04:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-10-21 20:04:09,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504857359] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:09,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:09,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-21 20:04:09,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18576181] [2021-10-21 20:04:09,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:09,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:09,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:09,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:09,827 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-10-21 20:04:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:09,953 INFO L93 Difference]: Finished difference Result 227 states and 265 transitions. [2021-10-21 20:04:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:04:09,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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 29 [2021-10-21 20:04:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:09,957 INFO L225 Difference]: With dead ends: 227 [2021-10-21 20:04:09,957 INFO L226 Difference]: Without dead ends: 200 [2021-10-21 20:04:09,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:04:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-21 20:04:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 96. [2021-10-21 20:04:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 95 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-10-21 20:04:09,990 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 29 [2021-10-21 20:04:09,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:09,991 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-10-21 20:04:09,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-10-21 20:04:09,991 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-10-21 20:04:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-21 20:04:09,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:09,996 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:04:10,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:10,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:10,224 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:10,225 INFO L82 PathProgramCache]: Analyzing trace with hash 305051558, now seen corresponding path program 4 times [2021-10-21 20:04:10,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:10,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768477850] [2021-10-21 20:04:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:10,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-10-21 20:04:10,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:10,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768477850] [2021-10-21 20:04:10,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768477850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:10,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708336475] [2021-10-21 20:04:10,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:04:10,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:10,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:10,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:10,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:04:10,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:04:10,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:10,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:04:10,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-10-21 20:04:10,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708336475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:10,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:10,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 20:04:10,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961514914] [2021-10-21 20:04:10,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:04:10,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:04:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:04:10,762 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-10-21 20:04:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:10,797 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2021-10-21 20:04:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:04:10,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 95 [2021-10-21 20:04:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:10,799 INFO L225 Difference]: With dead ends: 204 [2021-10-21 20:04:10,799 INFO L226 Difference]: Without dead ends: 120 [2021-10-21 20:04:10,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:04:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-21 20:04:10,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2021-10-21 20:04:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2021-10-21 20:04:10,832 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 95 [2021-10-21 20:04:10,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:10,835 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2021-10-21 20:04:10,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-10-21 20:04:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2021-10-21 20:04:10,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-21 20:04:10,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:10,850 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:04:10,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-21 20:04:11,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-21 20:04:11,060 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash -986598490, now seen corresponding path program 5 times [2021-10-21 20:04:11,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:11,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052694246] [2021-10-21 20:04:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:11,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2021-10-21 20:04:11,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:11,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052694246] [2021-10-21 20:04:11,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052694246] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:11,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356687760] [2021-10-21 20:04:11,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:04:11,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:11,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:11,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:11,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:04:11,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-21 20:04:11,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:11,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:04:11,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 754 proven. 16 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-10-21 20:04:11,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356687760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:11,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:11,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-21 20:04:11,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402979892] [2021-10-21 20:04:11,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:04:11,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:11,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:04:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:11,627 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:11,659 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2021-10-21 20:04:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:04:11,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-10-21 20:04:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:11,664 INFO L225 Difference]: With dead ends: 234 [2021-10-21 20:04:11,664 INFO L226 Difference]: Without dead ends: 136 [2021-10-21 20:04:11,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-21 20:04:11,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-10-21 20:04:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1181102362204725) internal successors, (142), 127 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2021-10-21 20:04:11,700 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 111 [2021-10-21 20:04:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:11,701 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2021-10-21 20:04:11,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2021-10-21 20:04:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-21 20:04:11,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:11,707 INFO L512 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:04:11,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:11,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:11,935 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:11,936 INFO L82 PathProgramCache]: Analyzing trace with hash -859525210, now seen corresponding path program 6 times [2021-10-21 20:04:11,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:11,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991172125] [2021-10-21 20:04:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:11,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2021-10-21 20:04:12,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:12,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991172125] [2021-10-21 20:04:12,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991172125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:12,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907994971] [2021-10-21 20:04:12,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:04:12,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:12,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:12,092 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:12,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 20:04:12,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-10-21 20:04:12,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:12,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:04:12,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 1094 proven. 25 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-10-21 20:04:12,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907994971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:12,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:12,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-21 20:04:12,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610184158] [2021-10-21 20:04:12,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:04:12,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:04:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:04:12,560 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:12,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:12,621 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2021-10-21 20:04:12,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:04:12,622 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 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 127 [2021-10-21 20:04:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:12,623 INFO L225 Difference]: With dead ends: 256 [2021-10-21 20:04:12,623 INFO L226 Difference]: Without dead ends: 144 [2021-10-21 20:04:12,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:04:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-21 20:04:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-21 20:04:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1048951048951048) internal successors, (158), 143 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2021-10-21 20:04:12,663 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 127 [2021-10-21 20:04:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:12,664 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2021-10-21 20:04:12,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2021-10-21 20:04:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-10-21 20:04:12,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:12,668 INFO L512 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:04:12,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:12,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 20:04:12,896 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:12,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1331145638, now seen corresponding path program 7 times [2021-10-21 20:04:12,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:12,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784153443] [2021-10-21 20:04:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:12,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-10-21 20:04:13,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:13,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784153443] [2021-10-21 20:04:13,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784153443] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:13,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849254826] [2021-10-21 20:04:13,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:04:13,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:13,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:13,033 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:13,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 20:04:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:13,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:04:13,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-10-21 20:04:13,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849254826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:13,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:13,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-21 20:04:13,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151406702] [2021-10-21 20:04:13,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:13,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:13,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:13,639 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:13,678 INFO L93 Difference]: Finished difference Result 369 states and 406 transitions. [2021-10-21 20:04:13,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:04:13,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 143 [2021-10-21 20:04:13,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:13,681 INFO L225 Difference]: With dead ends: 369 [2021-10-21 20:04:13,681 INFO L226 Difference]: Without dead ends: 260 [2021-10-21 20:04:13,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-21 20:04:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 204. [2021-10-21 20:04:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0935960591133005) internal successors, (222), 203 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 222 transitions. [2021-10-21 20:04:13,705 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 222 transitions. Word has length 143 [2021-10-21 20:04:13,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:13,709 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 222 transitions. [2021-10-21 20:04:13,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 222 transitions. [2021-10-21 20:04:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-10-21 20:04:13,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:13,713 INFO L512 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:04:13,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:13,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 20:04:13,920 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1485965146, now seen corresponding path program 8 times [2021-10-21 20:04:13,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:13,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268877809] [2021-10-21 20:04:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:13,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2021-10-21 20:04:14,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:14,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268877809] [2021-10-21 20:04:14,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268877809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:14,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883643243] [2021-10-21 20:04:14,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:04:14,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:14,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:14,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:14,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 20:04:14,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:04:14,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:14,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:04:14,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2021-10-21 20:04:14,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883643243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:14,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:14,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-21 20:04:14,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657200658] [2021-10-21 20:04:14,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:04:14,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:14,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:04:14,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:04:14,766 INFO L87 Difference]: Start difference. First operand 204 states and 222 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:14,810 INFO L93 Difference]: Finished difference Result 474 states and 518 transitions. [2021-10-21 20:04:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:04:14,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 203 [2021-10-21 20:04:14,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:14,813 INFO L225 Difference]: With dead ends: 474 [2021-10-21 20:04:14,813 INFO L226 Difference]: Without dead ends: 320 [2021-10-21 20:04:14,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:04:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-10-21 20:04:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 264. [2021-10-21 20:04:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0874524714828897) internal successors, (286), 263 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2021-10-21 20:04:14,834 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 203 [2021-10-21 20:04:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:14,834 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2021-10-21 20:04:14,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2021-10-21 20:04:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-10-21 20:04:14,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:14,839 INFO L512 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:04:14,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:15,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:15,060 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:15,061 INFO L82 PathProgramCache]: Analyzing trace with hash 889851302, now seen corresponding path program 9 times [2021-10-21 20:04:15,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:15,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651734865] [2021-10-21 20:04:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:15,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2021-10-21 20:04:15,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:15,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651734865] [2021-10-21 20:04:15,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651734865] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:15,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104128903] [2021-10-21 20:04:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:04:15,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:15,220 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:15,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 20:04:15,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-10-21 20:04:15,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:15,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:04:15,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4214 proven. 526 refuted. 0 times theorem prover too weak. 6371 trivial. 0 not checked. [2021-10-21 20:04:16,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104128903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:16,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:16,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-21 20:04:16,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375729824] [2021-10-21 20:04:16,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:04:16,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:04:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:16,221 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:16,275 INFO L93 Difference]: Finished difference Result 579 states and 630 transitions. [2021-10-21 20:04:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:04:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-10-21 20:04:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:16,279 INFO L225 Difference]: With dead ends: 579 [2021-10-21 20:04:16,279 INFO L226 Difference]: Without dead ends: 380 [2021-10-21 20:04:16,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-10-21 20:04:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 324. [2021-10-21 20:04:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.08359133126935) internal successors, (350), 323 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 350 transitions. [2021-10-21 20:04:16,304 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 350 transitions. Word has length 263 [2021-10-21 20:04:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:16,305 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 350 transitions. [2021-10-21 20:04:16,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 350 transitions. [2021-10-21 20:04:16,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-10-21 20:04:16,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:16,311 INFO L512 BasicCegarLoop]: trace histogram [120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:04:16,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:16,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 20:04:16,536 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:16,537 INFO L82 PathProgramCache]: Analyzing trace with hash -955282778, now seen corresponding path program 10 times [2021-10-21 20:04:16,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:16,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496323648] [2021-10-21 20:04:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:16,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2021-10-21 20:04:16,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:16,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496323648] [2021-10-21 20:04:16,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496323648] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:16,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223904831] [2021-10-21 20:04:16,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:04:16,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:16,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:16,722 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:16,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 20:04:17,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:04:17,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:17,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:04:17,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2021-10-21 20:04:17,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223904831] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:17,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:17,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-21 20:04:17,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260227128] [2021-10-21 20:04:17,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:04:17,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:17,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:04:17,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:04:17,956 INFO L87 Difference]: Start difference. First operand 324 states and 350 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:18,013 INFO L93 Difference]: Finished difference Result 628 states and 682 transitions. [2021-10-21 20:04:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:04:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 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 323 [2021-10-21 20:04:18,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:18,016 INFO L225 Difference]: With dead ends: 628 [2021-10-21 20:04:18,017 INFO L226 Difference]: Without dead ends: 384 [2021-10-21 20:04:18,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:04:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-10-21 20:04:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2021-10-21 20:04:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.080939947780679) internal successors, (414), 383 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 414 transitions. [2021-10-21 20:04:18,049 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 414 transitions. Word has length 323 [2021-10-21 20:04:18,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:18,050 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 414 transitions. [2021-10-21 20:04:18,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 414 transitions. [2021-10-21 20:04:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-10-21 20:04:18,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:18,059 INFO L512 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:04:18,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:18,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:18,284 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1217433690, now seen corresponding path program 11 times [2021-10-21 20:04:18,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:18,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658271876] [2021-10-21 20:04:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:18,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2021-10-21 20:04:18,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:18,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658271876] [2021-10-21 20:04:18,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658271876] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:18,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211774692] [2021-10-21 20:04:18,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:04:18,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:18,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:18,449 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:18,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 20:04:19,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2021-10-21 20:04:19,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:19,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:04:19,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2021-10-21 20:04:20,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211774692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:20,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:20,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-21 20:04:20,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492787605] [2021-10-21 20:04:20,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:04:20,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:04:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:20,115 INFO L87 Difference]: Start difference. First operand 384 states and 414 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:20,197 INFO L93 Difference]: Finished difference Result 948 states and 1023 transitions. [2021-10-21 20:04:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:04:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 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 383 [2021-10-21 20:04:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:20,204 INFO L225 Difference]: With dead ends: 948 [2021-10-21 20:04:20,205 INFO L226 Difference]: Without dead ends: 754 [2021-10-21 20:04:20,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:04:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-10-21 20:04:20,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 570. [2021-10-21 20:04:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.07908611599297) internal successors, (614), 569 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 614 transitions. [2021-10-21 20:04:20,263 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 614 transitions. Word has length 383 [2021-10-21 20:04:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:20,264 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 614 transitions. [2021-10-21 20:04:20,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 614 transitions. [2021-10-21 20:04:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2021-10-21 20:04:20,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:20,284 INFO L512 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-21 20:04:20,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:20,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 20:04:20,500 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash 267351982, now seen corresponding path program 12 times [2021-10-21 20:04:20,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:20,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515169520] [2021-10-21 20:04:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:20,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2021-10-21 20:04:20,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:20,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515169520] [2021-10-21 20:04:20,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515169520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:20,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071915587] [2021-10-21 20:04:20,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:04:20,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:20,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:20,903 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:20,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 20:04:21,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 134 check-sat command(s) [2021-10-21 20:04:21,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:21,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:04:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 0 proven. 28334 refuted. 0 times theorem prover too weak. 28050 trivial. 0 not checked. [2021-10-21 20:04:23,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071915587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:23,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:23,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-10-21 20:04:23,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339636027] [2021-10-21 20:04:23,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:04:23,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:23,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:04:23,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:04:23,727 INFO L87 Difference]: Start difference. First operand 570 states and 614 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:24,012 INFO L93 Difference]: Finished difference Result 2160 states and 2331 transitions. [2021-10-21 20:04:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 20:04:24,012 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 569 [2021-10-21 20:04:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:24,024 INFO L225 Difference]: With dead ends: 2160 [2021-10-21 20:04:24,024 INFO L226 Difference]: Without dead ends: 1873 [2021-10-21 20:04:24,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-10-21 20:04:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-10-21 20:04:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1131. [2021-10-21 20:04:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 1.0778761061946902) internal successors, (1218), 1130 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1218 transitions. [2021-10-21 20:04:24,121 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1218 transitions. Word has length 569 [2021-10-21 20:04:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:24,122 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1218 transitions. [2021-10-21 20:04:24,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1218 transitions. [2021-10-21 20:04:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2021-10-21 20:04:24,136 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:24,137 INFO L512 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-21 20:04:24,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:24,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 20:04:24,350 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:24,351 INFO L82 PathProgramCache]: Analyzing trace with hash 550676450, now seen corresponding path program 13 times [2021-10-21 20:04:24,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:24,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928016296] [2021-10-21 20:04:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:24,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2021-10-21 20:04:25,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:25,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928016296] [2021-10-21 20:04:25,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928016296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:25,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331772629] [2021-10-21 20:04:25,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:04:25,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:25,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:25,104 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:25,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 20:04:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:26,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 20:04:26,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2021-10-21 20:04:28,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331772629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:28,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:28,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-21 20:04:28,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879198641] [2021-10-21 20:04:28,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:04:28,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:28,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:04:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:28,959 INFO L87 Difference]: Start difference. First operand 1131 states and 1218 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:29,076 INFO L93 Difference]: Finished difference Result 2441 states and 2631 transitions. [2021-10-21 20:04:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:04:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 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 1130 [2021-10-21 20:04:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:29,087 INFO L225 Difference]: With dead ends: 2441 [2021-10-21 20:04:29,087 INFO L226 Difference]: Without dead ends: 1686 [2021-10-21 20:04:29,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:04:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-10-21 20:04:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1410. [2021-10-21 20:04:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 1.0773598296664302) internal successors, (1518), 1409 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1518 transitions. [2021-10-21 20:04:29,189 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1518 transitions. Word has length 1130 [2021-10-21 20:04:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:29,191 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 1518 transitions. [2021-10-21 20:04:29,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1518 transitions. [2021-10-21 20:04:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1410 [2021-10-21 20:04:29,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:29,211 INFO L512 BasicCegarLoop]: trace histogram [540, 540, 90, 90, 90, 15, 15, 15, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-21 20:04:29,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:29,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 20:04:29,412 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:29,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:29,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1545912050, now seen corresponding path program 14 times [2021-10-21 20:04:29,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:29,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196139754] [2021-10-21 20:04:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:29,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2021-10-21 20:04:30,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:30,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196139754] [2021-10-21 20:04:30,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196139754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:30,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048324088] [2021-10-21 20:04:30,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:04:30,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:30,404 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:30,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 20:04:31,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:04:31,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:04:32,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2021-10-21 20:04:35,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048324088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:35,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:04:35,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-21 20:04:35,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420590166] [2021-10-21 20:04:35,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:04:35,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:04:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:04:35,210 INFO L87 Difference]: Start difference. First operand 1410 states and 1518 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:35,359 INFO L93 Difference]: Finished difference Result 2630 states and 2834 transitions. [2021-10-21 20:04:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:04:35,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 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 1409 [2021-10-21 20:04:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:35,372 INFO L225 Difference]: With dead ends: 2630 [2021-10-21 20:04:35,373 INFO L226 Difference]: Without dead ends: 1689 [2021-10-21 20:04:35,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1416 GetRequests, 1409 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:04:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-10-21 20:04:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1689. [2021-10-21 20:04:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 1.0770142180094786) internal successors, (1818), 1688 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 1818 transitions. [2021-10-21 20:04:35,503 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 1818 transitions. Word has length 1409 [2021-10-21 20:04:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:35,504 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 1818 transitions. [2021-10-21 20:04:35,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 1818 transitions. [2021-10-21 20:04:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2021-10-21 20:04:35,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:04:35,532 INFO L512 BasicCegarLoop]: trace histogram [648, 648, 108, 108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-21 20:04:35,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:35,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:35,747 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 20:04:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:04:35,747 INFO L82 PathProgramCache]: Analyzing trace with hash -477789726, now seen corresponding path program 15 times [2021-10-21 20:04:35,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:04:35,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957610741] [2021-10-21 20:04:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:04:35,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:04:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:04:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 0 proven. 339924 refuted. 0 times theorem prover too weak. 169119 trivial. 0 not checked. [2021-10-21 20:04:37,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:04:37,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957610741] [2021-10-21 20:04:37,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957610741] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:04:37,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293545867] [2021-10-21 20:04:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:04:37,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:37,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:04:37,704 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:04:37,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 20:04:39,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2021-10-21 20:04:39,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:04:39,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 20:04:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:04:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 242798 proven. 0 refuted. 0 times theorem prover too weak. 266245 trivial. 0 not checked. [2021-10-21 20:04:44,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293545867] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:04:44,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:04:44,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 18 [2021-10-21 20:04:44,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984887335] [2021-10-21 20:04:44,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 20:04:44,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:04:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 20:04:44,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-21 20:04:44,649 INFO L87 Difference]: Start difference. First operand 1689 states and 1818 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:04:44,835 INFO L93 Difference]: Finished difference Result 1689 states and 1818 transitions. [2021-10-21 20:04:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:04:44,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 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 1688 [2021-10-21 20:04:44,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:04:44,840 INFO L225 Difference]: With dead ends: 1689 [2021-10-21 20:04:44,840 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:04:44,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1693 GetRequests, 1677 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-10-21 20:04:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:04:44,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:04:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:04:44,846 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1688 [2021-10-21 20:04:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:04:44,847 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:04:44,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:04:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:04:44,847 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:04:44,850 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:04:44,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:04:45,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:04:45,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 20:04:45,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:04:45,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:04:58,565 WARN L207 SmtUtils]: Spent 13.47 s on a formula simplification. DAG size of input: 2361 DAG size of output: 394 [2021-10-21 20:04:58,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:04:58,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:04:58,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 20:05:01,422 INFO L857 garLoopResultBuilder]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2021-10-21 20:05:01,422 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2021-10-21 20:05:01,422 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~b~0 7) (< ULTIMATE.start_main_~d~0 7) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~c~0 7)) [2021-10-21 20:05:01,422 INFO L857 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-10-21 20:05:01,422 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 20:05:01,423 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 20:05:01,423 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 20:05:01,423 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2021-10-21 20:05:01,423 INFO L857 garLoopResultBuilder]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2021-10-21 20:05:01,423 INFO L853 garLoopResultBuilder]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~c~0 7) (<= ULTIMATE.start_main_~b~0 5)) [2021-10-21 20:05:01,423 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 20:05:01,423 INFO L857 garLoopResultBuilder]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2021-10-21 20:05:01,424 INFO L853 garLoopResultBuilder]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~c~0 6) (<= ULTIMATE.start_main_~b~0 5)) [2021-10-21 20:05:01,424 INFO L860 garLoopResultBuilder]: At program point L34(lines 15 35) the Hoare annotation is: true [2021-10-21 20:05:01,424 INFO L857 garLoopResultBuilder]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2021-10-21 20:05:01,424 INFO L853 garLoopResultBuilder]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (<= 6 ULTIMATE.start_main_~d~0) (<= 6 ULTIMATE.start_main_~b~0) (< ULTIMATE.start_main_~b~0 7) (< ULTIMATE.start_main_~a~0 7) (< ULTIMATE.start_main_~d~0 7) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~c~0 7)) [2021-10-21 20:05:01,424 INFO L857 garLoopResultBuilder]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2021-10-21 20:05:01,429 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:05:01,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:05:01 BoogieIcfgContainer [2021-10-21 20:05:01,447 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:05:01,447 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:05:01,448 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:05:01,448 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:05:01,449 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:04:07" (3/4) ... [2021-10-21 20:05:01,452 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:05:01,476 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-21 20:05:01,476 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 20:05:01,476 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:05:01,480 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:05:01,534 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:05:01,534 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:05:01,536 INFO L168 Benchmark]: Toolchain (without parser) took 54807.20 ms. Allocated memory was 113.2 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 87.8 MB in the beginning and 998.6 MB in the end (delta: -910.8 MB). Peak memory consumption was 238.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:01,537 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory is still 51.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:01,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.77 ms. Allocated memory is still 113.2 MB. Free memory was 87.6 MB in the beginning and 78.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:01,538 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.40 ms. Allocated memory is still 113.2 MB. Free memory was 78.2 MB in the beginning and 76.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:01,539 INFO L168 Benchmark]: Boogie Preprocessor took 22.74 ms. Allocated memory is still 113.2 MB. Free memory was 76.9 MB in the beginning and 76.0 MB in the end (delta: 966.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:01,539 INFO L168 Benchmark]: RCFGBuilder took 345.39 ms. Allocated memory is still 113.2 MB. Free memory was 75.8 MB in the beginning and 66.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:01,540 INFO L168 Benchmark]: TraceAbstraction took 54090.76 ms. Allocated memory was 113.2 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 65.9 MB in the beginning and 1.0 GB in the end (delta: -934.8 MB). Peak memory consumption was 706.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:05:01,541 INFO L168 Benchmark]: Witness Printer took 87.23 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 998.6 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:05:01,543 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory is still 51.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 218.77 ms. Allocated memory is still 113.2 MB. Free memory was 87.6 MB in the beginning and 78.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.40 ms. Allocated memory is still 113.2 MB. Free memory was 78.2 MB in the beginning and 76.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.74 ms. Allocated memory is still 113.2 MB. Free memory was 76.9 MB in the beginning and 76.0 MB in the end (delta: 966.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 345.39 ms. Allocated memory is still 113.2 MB. Free memory was 75.8 MB in the beginning and 66.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 54090.76 ms. Allocated memory was 113.2 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 65.9 MB in the beginning and 1.0 GB in the end (delta: -934.8 MB). Peak memory consumption was 706.5 MB. Max. memory is 16.1 GB. * Witness Printer took 87.23 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 998.6 MB in the end (delta: 2.1 MB). There was no memory consumed. 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: 32]: 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, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 54007.0ms, OverallIterations: 20, TraceHistogramMax: 648, EmptinessCheckTime: 140.9ms, AutomataDifference: 1721.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 16345.4ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 268 SDtfs, 557 SDslu, 491 SDs, 0 SdLazy, 394 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 368.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6623 GetRequests, 6505 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 670.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1689occurred in iteration=19, InterpolantAutomatonStates: 140, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 662.8ms AutomataMinimizationTime, 20 MinimizatonAttempts, 1518 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 913 NumberOfFragments, 71 HoareAnnotationTreeSize, 5 FomulaSimplifications, 579689 FormulaSimplificationTreeSizeReduction, 13735.5ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 20312 FormulaSimplificationTreeSizeReductionInter, 2593.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 775.2ms SsaConstructionTime, 4630.2ms SatisfiabilityAnalysisTime, 20152.9ms InterpolantComputationTime, 13057 NumberOfCodeBlocks, 11607 NumberOfCodeBlocksAsserted, 554 NumberOfCheckSat, 13022 ConstructedInterpolants, 0 QuantifiedInterpolants, 24931 SizeOfPredicates, 4 NumberOfNonLiveVariables, 8601 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 35 InterpolantComputations, 6 PerfectInterpolantSequences, 1935239/2423578 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: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((a < 6 && d < 7) && c < 6) && b <= 5 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((a < 6 && 6 <= d) && b < 7) && d < 7) && 6 <= c) && c < 7 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((6 <= d && 6 <= b) && b < 7) && a < 7) && d < 7) && 6 <= c) && c < 7 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((a < 6 && 6 <= d) && d < 7) && c < 7) && b <= 5 RESULT: Ultimate proved your program to be correct! [2021-10-21 20:05:01,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac5f9fcb-4432-4e01-8a46-522b2d378d6e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...