./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/cggmp2005b.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/cggmp2005b.i -s /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer --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 fef737e6ce8f4d154b70d44967f8d8c87159a2fe ................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:05:52,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:05:52,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:05:52,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:05:52,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:05:52,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:05:52,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:05:52,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:05:52,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:05:52,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:05:52,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:05:52,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:05:52,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:05:52,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:05:52,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:05:52,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:05:52,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:05:52,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:05:52,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:05:52,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:05:52,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:05:52,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:05:52,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:05:52,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:05:52,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:05:52,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:05:52,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:05:52,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:05:52,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:05:52,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:05:52,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:05:52,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:05:52,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:05:52,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:05:52,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:05:52,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:05:52,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:05:52,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:05:52,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:05:52,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:05:52,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:05:52,350 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:05:52,375 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:05:52,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:05:52,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:05:52,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:05:52,377 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:05:52,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:05:52,377 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:05:52,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:05:52,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:05:52,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:05:52,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:05:52,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:05:52,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:05:52,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:05:52,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:05:52,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:05:52,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:05:52,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:05:52,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:05:52,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:05:52,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:05:52,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:05:52,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:05:52,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:05:52,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:05:52,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:05:52,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:05:52,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:05:52,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:05:52,384 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-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fef737e6ce8f4d154b70d44967f8d8c87159a2fe [2020-11-29 21:05:52,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:05:52,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:05:52,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:05:52,676 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:05:52,677 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:05:52,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/../../sv-benchmarks/c/loop-lit/cggmp2005b.i [2020-11-29 21:05:52,779 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/data/a6ed4175f/c91a8fecc49f4365bb82496541aa11dc/FLAG2faa4f1b9 [2020-11-29 21:05:53,347 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:05:53,349 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/sv-benchmarks/c/loop-lit/cggmp2005b.i [2020-11-29 21:05:53,360 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/data/a6ed4175f/c91a8fecc49f4365bb82496541aa11dc/FLAG2faa4f1b9 [2020-11-29 21:05:53,669 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/data/a6ed4175f/c91a8fecc49f4365bb82496541aa11dc [2020-11-29 21:05:53,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:05:53,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:05:53,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:05:53,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:05:53,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:05:53,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:05:53" (1/1) ... [2020-11-29 21:05:53,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3417e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:53, skipping insertion in model container [2020-11-29 21:05:53,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:05:53" (1/1) ... [2020-11-29 21:05:53,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:05:53,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:05:53,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:05:53,995 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:05:54,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:05:54,045 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:05:54,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54 WrapperNode [2020-11-29 21:05:54,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:05:54,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:05:54,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:05:54,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:05:54,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (1/1) ... [2020-11-29 21:05:54,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (1/1) ... [2020-11-29 21:05:54,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:05:54,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:05:54,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:05:54,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:05:54,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (1/1) ... [2020-11-29 21:05:54,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (1/1) ... [2020-11-29 21:05:54,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (1/1) ... [2020-11-29 21:05:54,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (1/1) ... [2020-11-29 21:05:54,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (1/1) ... [2020-11-29 21:05:54,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (1/1) ... [2020-11-29 21:05:54,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (1/1) ... [2020-11-29 21:05:54,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:05:54,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:05:54,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:05:54,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:05:54,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:05:54,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:05:54,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:05:54,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:05:54,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:05:54,562 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:05:54,562 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-29 21:05:54,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:05:54 BoogieIcfgContainer [2020-11-29 21:05:54,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:05:54,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:05:54,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:05:54,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:05:54,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:05:53" (1/3) ... [2020-11-29 21:05:54,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469c0bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:05:54, skipping insertion in model container [2020-11-29 21:05:54,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:05:54" (2/3) ... [2020-11-29 21:05:54,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469c0bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:05:54, skipping insertion in model container [2020-11-29 21:05:54,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:05:54" (3/3) ... [2020-11-29 21:05:54,575 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-11-29 21:05:54,587 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:05:54,592 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:05:54,606 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:05:54,644 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:05:54,645 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:05:54,645 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:05:54,645 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:05:54,646 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:05:54,646 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:05:54,646 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:05:54,646 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:05:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-29 21:05:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 21:05:54,666 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:05:54,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:05:54,667 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:05:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:05:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1093727336, now seen corresponding path program 1 times [2020-11-29 21:05:54,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:05:54,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134838506] [2020-11-29 21:05:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:05:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:05:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:05:54,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134838506] [2020-11-29 21:05:54,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:05:54,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 21:05:54,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125685606] [2020-11-29 21:05:54,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 21:05:54,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:05:54,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 21:05:54,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:05:54,863 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-11-29 21:05:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:05:54,882 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2020-11-29 21:05:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 21:05:54,884 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-29 21:05:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:05:54,893 INFO L225 Difference]: With dead ends: 31 [2020-11-29 21:05:54,893 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 21:05:54,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:05:54,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 21:05:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 21:05:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 21:05:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-29 21:05:54,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2020-11-29 21:05:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:05:54,934 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-29 21:05:54,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 21:05:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-29 21:05:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 21:05:54,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:05:54,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:05:54,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:05:54,936 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:05:54,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:05:54,938 INFO L82 PathProgramCache]: Analyzing trace with hash 263481957, now seen corresponding path program 1 times [2020-11-29 21:05:54,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:05:54,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708482595] [2020-11-29 21:05:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:05:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:05:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:05:55,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708482595] [2020-11-29 21:05:55,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:05:55,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:05:55,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976646875] [2020-11-29 21:05:55,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:05:55,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:05:55,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:05:55,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:05:55,006 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2020-11-29 21:05:55,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:05:55,034 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-11-29 21:05:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:05:55,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-29 21:05:55,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:05:55,036 INFO L225 Difference]: With dead ends: 19 [2020-11-29 21:05:55,036 INFO L226 Difference]: Without dead ends: 13 [2020-11-29 21:05:55,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:05:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-29 21:05:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-29 21:05:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 21:05:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-29 21:05:55,041 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2020-11-29 21:05:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:05:55,042 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-29 21:05:55,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:05:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-29 21:05:55,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 21:05:55,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:05:55,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:05:55,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 21:05:55,043 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:05:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:05:55,044 INFO L82 PathProgramCache]: Analyzing trace with hash 988085523, now seen corresponding path program 1 times [2020-11-29 21:05:55,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:05:55,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592351850] [2020-11-29 21:05:55,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:05:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:05:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:05:55,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592351850] [2020-11-29 21:05:55,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:05:55,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:05:55,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956269567] [2020-11-29 21:05:55,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:05:55,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:05:55,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:05:55,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:05:55,110 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-11-29 21:05:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:05:55,130 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-11-29 21:05:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:05:55,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-29 21:05:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:05:55,133 INFO L225 Difference]: With dead ends: 24 [2020-11-29 21:05:55,133 INFO L226 Difference]: Without dead ends: 14 [2020-11-29 21:05:55,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:05:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-29 21:05:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-29 21:05:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 21:05:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-11-29 21:05:55,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2020-11-29 21:05:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:05:55,138 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-29 21:05:55,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:05:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-11-29 21:05:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 21:05:55,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:05:55,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:05:55,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 21:05:55,144 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:05:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:05:55,146 INFO L82 PathProgramCache]: Analyzing trace with hash 272780751, now seen corresponding path program 1 times [2020-11-29 21:05:55,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:05:55,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86609602] [2020-11-29 21:05:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:05:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:05:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 21:05:55,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86609602] [2020-11-29 21:05:55,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430910526] [2020-11-29 21:05:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:05:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:05:55,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 21:05:55,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:05:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 21:05:55,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:05:55,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 21:05:55,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491449041] [2020-11-29 21:05:55,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 21:05:55,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:05:55,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 21:05:55,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:05:55,389 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-11-29 21:05:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:05:55,416 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-11-29 21:05:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:05:55,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-29 21:05:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:05:55,417 INFO L225 Difference]: With dead ends: 24 [2020-11-29 21:05:55,418 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 21:05:55,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:05:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 21:05:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-29 21:05:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 21:05:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-11-29 21:05:55,423 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2020-11-29 21:05:55,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:05:55,424 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-11-29 21:05:55,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 21:05:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-11-29 21:05:55,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 21:05:55,425 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:05:55,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:05:55,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:05:55,639 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:05:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:05:55,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1314972803, now seen corresponding path program 2 times [2020-11-29 21:05:55,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:05:55,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498703770] [2020-11-29 21:05:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:05:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:05:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:05:55,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498703770] [2020-11-29 21:05:55,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437649276] [2020-11-29 21:05:55,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:05:55,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:05:55,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:05:55,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 21:05:55,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:05:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 21:05:55,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:05:55,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-11-29 21:05:55,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488102144] [2020-11-29 21:05:55,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:05:55,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:05:55,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:05:55,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:05:55,813 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 4 states. [2020-11-29 21:05:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:05:55,840 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2020-11-29 21:05:55,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:05:55,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-29 21:05:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:05:55,840 INFO L225 Difference]: With dead ends: 26 [2020-11-29 21:05:55,840 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 21:05:55,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-29 21:05:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 21:05:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 21:05:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 21:05:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 21:05:55,842 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-29 21:05:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:05:55,842 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:05:55,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:05:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 21:05:55,842 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 21:05:56,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:05:56,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 21:05:56,126 INFO L270 CegarLoopResult]: At program point L35-2(lines 35 37) the Hoare annotation is: (= ULTIMATE.start_main_~k~0 4) [2020-11-29 21:05:56,127 INFO L270 CegarLoopResult]: At program point L35-3(lines 29 38) the Hoare annotation is: (or (and (<= (+ ULTIMATE.start_main_~j~0 100) 0) (= ULTIMATE.start_main_~i~0 0)) (= ULTIMATE.start_main_~k~0 4)) [2020-11-29 21:05:56,127 INFO L270 CegarLoopResult]: At program point L31-2(lines 31 33) the Hoare annotation is: (or (<= ULTIMATE.start_main_~i~0 1) (= ULTIMATE.start_main_~k~0 4)) [2020-11-29 21:05:56,127 INFO L274 CegarLoopResult]: For program point L31-3(lines 31 33) no Hoare annotation was computed. [2020-11-29 21:05:56,127 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-29 21:05:56,127 INFO L277 CegarLoopResult]: At program point L40(lines 24 41) the Hoare annotation is: true [2020-11-29 21:05:56,127 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 21:05:56,127 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 21:05:56,128 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 21:05:56,128 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-29 21:05:56,128 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-29 21:05:56,128 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-29 21:05:56,128 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-29 21:05:56,128 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 21:05:56,128 INFO L274 CegarLoopResult]: For program point L29-2(lines 29 38) no Hoare annotation was computed. [2020-11-29 21:05:56,128 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-29 21:05:56,128 INFO L277 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-11-29 21:05:56,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:05:56 BoogieIcfgContainer [2020-11-29 21:05:56,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:05:56,151 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:05:56,151 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:05:56,151 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:05:56,152 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:05:54" (3/4) ... [2020-11-29 21:05:56,156 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 21:05:56,166 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-29 21:05:56,168 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 21:05:56,168 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:05:56,169 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:05:56,233 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fe4d2535-1617-49c4-b5a3-439f63dba38a/bin/uautomizer/witness.graphml [2020-11-29 21:05:56,234 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:05:56,236 INFO L168 Benchmark]: Toolchain (without parser) took 2559.85 ms. Allocated memory is still 102.8 MB. Free memory was 70.4 MB in the beginning and 51.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:05:56,243 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 73.4 MB. Free memory was 32.0 MB in the beginning and 31.9 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:05:56,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.35 ms. Allocated memory is still 102.8 MB. Free memory was 70.2 MB in the beginning and 80.0 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:05:56,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.62 ms. Allocated memory is still 102.8 MB. Free memory was 80.0 MB in the beginning and 78.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:05:56,246 INFO L168 Benchmark]: Boogie Preprocessor took 38.48 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 77.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:05:56,249 INFO L168 Benchmark]: RCFGBuilder took 432.89 ms. Allocated memory is still 102.8 MB. Free memory was 77.4 MB in the beginning and 66.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:05:56,251 INFO L168 Benchmark]: TraceAbstraction took 1584.10 ms. Allocated memory is still 102.8 MB. Free memory was 65.8 MB in the beginning and 54.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:05:56,252 INFO L168 Benchmark]: Witness Printer took 82.90 ms. Allocated memory is still 102.8 MB. Free memory was 54.0 MB in the beginning and 51.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:05:56,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 73.4 MB. Free memory was 32.0 MB in the beginning and 31.9 MB in the end (delta: 36.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 367.35 ms. Allocated memory is still 102.8 MB. Free memory was 70.2 MB in the beginning and 80.0 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.62 ms. Allocated memory is still 102.8 MB. Free memory was 80.0 MB in the beginning and 78.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.48 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 77.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 432.89 ms. Allocated memory is still 102.8 MB. Free memory was 77.4 MB in the beginning and 66.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1584.10 ms. Allocated memory is still 102.8 MB. Free memory was 65.8 MB in the beginning and 54.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 82.90 ms. Allocated memory is still 102.8 MB. Free memory was 54.0 MB in the beginning and 51.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (j + 100 <= 0 && i == 0) || k == 4 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: i <= 1 || k == 4 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 67 SDtfs, 5 SDslu, 60 SDs, 0 SdLazy, 21 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 15 NumberOfFragments, 25 HoareAnnotationTreeSize, 5 FomulaSimplifications, 24 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 1825 SizeOfPredicates, 4 NumberOfNonLiveVariables, 109 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 17/21 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...