./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01-2.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_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/sum01-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/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 7e441b408705ca8366624dd497de58641bec51a6 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:02:27,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:02:27,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:02:27,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:02:27,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:02:27,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:02:27,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:02:27,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:02:27,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:02:27,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:02:27,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:02:27,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:02:27,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:02:27,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:02:27,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:02:27,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:02:27,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:02:27,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:02:27,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:02:28,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:02:28,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:02:28,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:02:28,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:02:28,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:02:28,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:02:28,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:02:28,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:02:28,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:02:28,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:02:28,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:02:28,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:02:28,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:02:28,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:02:28,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:02:28,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:02:28,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:02:28,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:02:28,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:02:28,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:02:28,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:02:28,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:02:28,072 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:02:28,136 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:02:28,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:02:28,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:02:28,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:02:28,139 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:02:28,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:02:28,140 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:02:28,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:02:28,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:02:28,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:02:28,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:02:28,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:02:28,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:02:28,141 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:02:28,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:02:28,141 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:02:28,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:02:28,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:02:28,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:02:28,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:02:28,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:02:28,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:02:28,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:02:28,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:02:28,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:02:28,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:02:28,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:02:28,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:02:28,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:02:28,153 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_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e441b408705ca8366624dd497de58641bec51a6 [2020-11-30 01:02:28,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:02:28,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:02:28,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:02:28,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:02:28,527 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:02:28,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/../../sv-benchmarks/c/loops/sum01-2.i [2020-11-30 01:02:28,620 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/data/fad0b7ab3/137a31a6fe33448c9e8bf7737ddf175d/FLAG62af2b347 [2020-11-30 01:02:29,194 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:02:29,195 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/sv-benchmarks/c/loops/sum01-2.i [2020-11-30 01:02:29,202 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/data/fad0b7ab3/137a31a6fe33448c9e8bf7737ddf175d/FLAG62af2b347 [2020-11-30 01:02:29,618 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/data/fad0b7ab3/137a31a6fe33448c9e8bf7737ddf175d [2020-11-30 01:02:29,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:02:29,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:02:29,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:02:29,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:02:29,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:02:29,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:02:29" (1/1) ... [2020-11-30 01:02:29,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217e498c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:29, skipping insertion in model container [2020-11-30 01:02:29,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:02:29" (1/1) ... [2020-11-30 01:02:29,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:02:29,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:02:29,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:02:30,002 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:02:30,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:02:30,057 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:02:30,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30 WrapperNode [2020-11-30 01:02:30,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:02:30,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:02:30,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:02:30,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:02:30,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (1/1) ... [2020-11-30 01:02:30,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (1/1) ... [2020-11-30 01:02:30,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:02:30,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:02:30,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:02:30,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:02:30,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (1/1) ... [2020-11-30 01:02:30,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (1/1) ... [2020-11-30 01:02:30,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (1/1) ... [2020-11-30 01:02:30,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (1/1) ... [2020-11-30 01:02:30,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (1/1) ... [2020-11-30 01:02:30,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (1/1) ... [2020-11-30 01:02:30,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (1/1) ... [2020-11-30 01:02:30,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:02:30,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:02:30,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:02:30,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:02:30,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/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 [2020-11-30 01:02:30,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:02:30,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:02:30,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:02:30,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:02:30,486 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:02:30,486 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 01:02:30,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:02:30 BoogieIcfgContainer [2020-11-30 01:02:30,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:02:30,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:02:30,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:02:30,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:02:30,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:02:29" (1/3) ... [2020-11-30 01:02:30,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4353165d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:02:30, skipping insertion in model container [2020-11-30 01:02:30,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:02:30" (2/3) ... [2020-11-30 01:02:30,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4353165d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:02:30, skipping insertion in model container [2020-11-30 01:02:30,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:02:30" (3/3) ... [2020-11-30 01:02:30,509 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-2.i [2020-11-30 01:02:30,535 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:02:30,555 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:02:30,585 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:02:30,648 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:02:30,648 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:02:30,648 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:02:30,649 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:02:30,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:02:30,649 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:02:30,649 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:02:30,649 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:02:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-30 01:02:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:02:30,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:02:30,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:02:30,672 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:02:30,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:02:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1475787113, now seen corresponding path program 1 times [2020-11-30 01:02:30,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:02:30,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470099927] [2020-11-30 01:02:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:02:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:02:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:02:30,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470099927] [2020-11-30 01:02:30,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:02:30,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:02:30,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508846123] [2020-11-30 01:02:30,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:02:30,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:02:30,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:02:30,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:02:30,928 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-30 01:02:30,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:02:30,947 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-11-30 01:02:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:02:30,949 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-30 01:02:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:02:30,960 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:02:30,960 INFO L226 Difference]: Without dead ends: 11 [2020-11-30 01:02:30,970 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 [2020-11-30 01:02:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-30 01:02:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-30 01:02:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-30 01:02:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-30 01:02:31,007 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-11-30 01:02:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:02:31,008 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-30 01:02:31,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:02:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-30 01:02:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:02:31,010 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:02:31,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:02:31,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:02:31,011 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:02:31,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:02:31,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1304012207, now seen corresponding path program 1 times [2020-11-30 01:02:31,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:02:31,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369952115] [2020-11-30 01:02:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:02:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:02:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:02:31,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369952115] [2020-11-30 01:02:31,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:02:31,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:02:31,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465424546] [2020-11-30 01:02:31,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:02:31,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:02:31,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:02:31,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:02:31,188 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2020-11-30 01:02:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:02:31,308 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-11-30 01:02:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:02:31,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-30 01:02:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:02:31,310 INFO L225 Difference]: With dead ends: 18 [2020-11-30 01:02:31,311 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 01:02:31,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:02:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 01:02:31,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 01:02:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 01:02:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-30 01:02:31,316 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-11-30 01:02:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:02:31,316 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-30 01:02:31,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:02:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-30 01:02:31,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:02:31,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:02:31,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:02:31,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:02:31,319 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:02:31,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:02:31,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1358865135, now seen corresponding path program 1 times [2020-11-30 01:02:31,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:02:31,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125264528] [2020-11-30 01:02:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:02:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:02:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:02:31,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125264528] [2020-11-30 01:02:31,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933413020] [2020-11-30 01:02:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/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 [2020-11-30 01:02:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:02:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:02:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:02:31,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:02:31,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:02:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:02:31,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:02:31,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-11-30 01:02:31,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930324677] [2020-11-30 01:02:31,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:02:31,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:02:31,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:02:31,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:02:31,981 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2020-11-30 01:02:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:02:32,079 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-30 01:02:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:02:32,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-11-30 01:02:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:02:32,080 INFO L225 Difference]: With dead ends: 20 [2020-11-30 01:02:32,080 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 01:02:32,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:02:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 01:02:32,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-30 01:02:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 01:02:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-30 01:02:32,085 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-11-30 01:02:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:02:32,085 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-30 01:02:32,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:02:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-30 01:02:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:02:32,111 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:02:32,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:02:32,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:02:32,327 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:02:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:02:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash -583482381, now seen corresponding path program 2 times [2020-11-30 01:02:32,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:02:32,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605113589] [2020-11-30 01:02:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:02:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:02:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:02:32,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605113589] [2020-11-30 01:02:32,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76784362] [2020-11-30 01:02:32,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/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 [2020-11-30 01:02:32,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:02:32,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:02:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 01:02:32,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:02:32,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:02:32,805 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-30 01:02:32,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:02:32,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:02:32,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:02:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:02:32,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:02:32,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-11-30 01:02:32,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901872013] [2020-11-30 01:02:32,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 01:02:32,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:02:32,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 01:02:32,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:02:32,851 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 15 states. [2020-11-30 01:02:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:02:33,201 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-11-30 01:02:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 01:02:33,204 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-11-30 01:02:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:02:33,205 INFO L225 Difference]: With dead ends: 26 [2020-11-30 01:02:33,205 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 01:02:33,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-11-30 01:02:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 01:02:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-30 01:02:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 01:02:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-30 01:02:33,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2020-11-30 01:02:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:02:33,215 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-30 01:02:33,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 01:02:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-30 01:02:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:02:33,220 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:02:33,220 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:02:33,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:02:33,447 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:02:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:02:33,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1068965943, now seen corresponding path program 3 times [2020-11-30 01:02:33,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:02:33,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417620354] [2020-11-30 01:02:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:02:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:02:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:02:33,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417620354] [2020-11-30 01:02:33,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481381930] [2020-11-30 01:02:33,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:02:33,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-30 01:02:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:02:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 01:02:33,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:02:34,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:02:34,113 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-30 01:02:34,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:02:34,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 01:02:34,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 01:02:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:02:34,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:02:34,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2020-11-30 01:02:34,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201022078] [2020-11-30 01:02:34,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 01:02:34,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:02:34,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 01:02:34,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:02:34,171 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 20 states. [2020-11-30 01:02:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:02:34,936 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-30 01:02:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 01:02:34,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 17 [2020-11-30 01:02:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:02:34,937 INFO L225 Difference]: With dead ends: 22 [2020-11-30 01:02:34,937 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:02:34,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2020-11-30 01:02:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:02:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:02:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:02:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:02:34,939 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-30 01:02:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:02:34,940 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:02:34,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 01:02:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:02:34,940 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:02:35,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:02:35,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:02:35,286 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:02:35,286 INFO L274 CegarLoopResult]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2020-11-30 01:02:35,286 INFO L270 CegarLoopResult]: At program point L25-3(lines 25 27) the Hoare annotation is: (or (let ((.cse1 (+ ULTIMATE.start_main_~sn~0 2)) (.cse0 (* 2 ULTIMATE.start_main_~i~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (< ULTIMATE.start_main_~sn~0 (+ (* 2 ULTIMATE.start_main_~n~0) 1)))) (and (= ULTIMATE.start_main_~i~0 1) (= ULTIMATE.start_main_~sn~0 0))) [2020-11-30 01:02:35,287 INFO L274 CegarLoopResult]: For program point L25-4(lines 25 27) no Hoare annotation was computed. [2020-11-30 01:02:35,287 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-11-30 01:02:35,287 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 01:02:35,287 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:02:35,287 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 01:02:35,287 INFO L274 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-11-30 01:02:35,288 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-30 01:02:35,288 INFO L274 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-11-30 01:02:35,288 INFO L277 CegarLoopResult]: At program point L16-2(lines 1 29) the Hoare annotation is: true [2020-11-30 01:02:35,288 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-30 01:02:35,288 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-30 01:02:35,289 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-30 01:02:35,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:02:35 BoogieIcfgContainer [2020-11-30 01:02:35,308 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:02:35,309 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:02:35,309 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:02:35,309 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:02:35,310 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:02:30" (3/4) ... [2020-11-30 01:02:35,313 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:02:35,325 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-30 01:02:35,325 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 01:02:35,326 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:02:35,326 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:02:35,383 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9619b955-93b2-4ca2-b3c7-f7bf74be30aa/bin/uautomizer/witness.graphml [2020-11-30 01:02:35,384 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:02:35,386 INFO L168 Benchmark]: Toolchain (without parser) took 5761.55 ms. Allocated memory was 104.9 MB in the beginning and 167.8 MB in the end (delta: 62.9 MB). Free memory was 78.1 MB in the beginning and 117.7 MB in the end (delta: -39.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:02:35,386 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 104.9 MB. Free memory is still 61.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:02:35,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 423.26 ms. Allocated memory is still 104.9 MB. Free memory was 77.9 MB in the beginning and 82.6 MB in the end (delta: -4.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:02:35,388 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.98 ms. Allocated memory is still 104.9 MB. Free memory was 82.6 MB in the beginning and 81.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:02:35,388 INFO L168 Benchmark]: Boogie Preprocessor took 47.21 ms. Allocated memory is still 104.9 MB. Free memory was 81.1 MB in the beginning and 80.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:02:35,389 INFO L168 Benchmark]: RCFGBuilder took 336.02 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 69.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:02:35,390 INFO L168 Benchmark]: TraceAbstraction took 4817.62 ms. Allocated memory was 104.9 MB in the beginning and 167.8 MB in the end (delta: 62.9 MB). Free memory was 69.0 MB in the beginning and 119.8 MB in the end (delta: -50.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2020-11-30 01:02:35,391 INFO L168 Benchmark]: Witness Printer took 75.19 ms. Allocated memory is still 167.8 MB. Free memory was 119.8 MB in the beginning and 117.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:02:35,394 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 104.9 MB. Free memory is still 61.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 423.26 ms. Allocated memory is still 104.9 MB. Free memory was 77.9 MB in the beginning and 82.6 MB in the end (delta: -4.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.98 ms. Allocated memory is still 104.9 MB. Free memory was 82.6 MB in the beginning and 81.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.21 ms. Allocated memory is still 104.9 MB. Free memory was 81.1 MB in the beginning and 80.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 336.02 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 69.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4817.62 ms. Allocated memory was 104.9 MB in the beginning and 167.8 MB in the end (delta: 62.9 MB). Free memory was 69.0 MB in the beginning and 119.8 MB in the end (delta: -50.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. * Witness Printer took 75.19 ms. Allocated memory is still 167.8 MB. Free memory was 119.8 MB in the beginning and 117.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 25]: Loop Invariant Derived loop invariant: ((2 * i <= sn + 2 && sn + 2 <= 2 * i) && sn < 2 * n + 1) || (i == 1 && sn == 0) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 30 SDslu, 90 SDs, 0 SdLazy, 268 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.0s 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, 2 LocationsWithAnnotation, 2 PreInvPairs, 8 NumberOfFragments, 31 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 103 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 7718 SizeOfPredicates, 15 NumberOfNonLiveVariables, 170 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 4/42 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...