./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c --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_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/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 6b7e4344a1b47d68a491e369e16c1769051091e9 .......................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:08:06,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:08:06,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:08:06,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:08:06,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:08:06,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:08:06,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:08:06,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:08:06,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:08:06,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:08:06,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:08:06,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:08:06,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:08:06,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:08:06,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:08:06,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:08:06,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:08:06,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:08:06,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:08:06,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:08:06,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:08:06,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:08:06,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:08:06,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:08:06,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:08:06,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:08:06,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:08:06,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:08:06,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:08:06,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:08:06,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:08:06,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:08:06,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:08:06,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:08:06,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:08:06,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:08:06,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:08:06,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:08:06,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:08:06,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:08:07,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:08:07,007 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:08:07,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:08:07,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:08:07,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:08:07,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:08:07,068 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:08:07,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:08:07,069 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:08:07,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:08:07,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:08:07,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:08:07,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:08:07,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:08:07,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:08:07,072 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:08:07,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:08:07,073 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:08:07,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:08:07,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:08:07,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:08:07,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:08:07,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:08:07,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:08:07,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:08:07,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:08:07,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:08:07,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:08:07,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:08:07,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:08:07,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:08:07,077 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_d382be37-e403-4af4-8713-aa93498ce724/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b7e4344a1b47d68a491e369e16c1769051091e9 [2020-11-28 03:08:07,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:08:07,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:08:07,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:08:07,531 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:08:07,533 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:08:07,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2020-11-28 03:08:07,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/data/83416344f/e5079a77bdd04922b74364582902c8a7/FLAGfec7fda47 [2020-11-28 03:08:08,188 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:08:08,188 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2020-11-28 03:08:08,195 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/data/83416344f/e5079a77bdd04922b74364582902c8a7/FLAGfec7fda47 [2020-11-28 03:08:08,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/data/83416344f/e5079a77bdd04922b74364582902c8a7 [2020-11-28 03:08:08,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:08:08,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:08:08,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:08:08,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:08:08,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:08:08,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:08,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658cd01f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08, skipping insertion in model container [2020-11-28 03:08:08,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:08,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:08:08,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:08:08,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:08:08,959 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:08:08,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:08:08,993 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:08:08,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08 WrapperNode [2020-11-28 03:08:08,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:08:08,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:08:08,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:08:08,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:08:09,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:09,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:09,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:08:09,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:08:09,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:08:09,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:08:09,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:09,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:09,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:09,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:09,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:09,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:09,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (1/1) ... [2020-11-28 03:08:09,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:08:09,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:08:09,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:08:09,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:08:09,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/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 [2020-11-28 03:08:09,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:08:09,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:08:09,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:08:09,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:08:09,414 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:08:09,414 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 03:08:09,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:08:09 BoogieIcfgContainer [2020-11-28 03:08:09,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:08:09,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:08:09,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:08:09,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:08:09,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:08:08" (1/3) ... [2020-11-28 03:08:09,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f35b6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:08:09, skipping insertion in model container [2020-11-28 03:08:09,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:08:08" (2/3) ... [2020-11-28 03:08:09,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f35b6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:08:09, skipping insertion in model container [2020-11-28 03:08:09,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:08:09" (3/3) ... [2020-11-28 03:08:09,428 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-b.c [2020-11-28 03:08:09,441 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:08:09,454 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:08:09,475 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:08:09,510 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:08:09,510 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:08:09,511 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:08:09,511 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:08:09,511 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:08:09,511 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:08:09,511 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:08:09,512 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:08:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-28 03:08:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 03:08:09,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:09,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 03:08:09,552 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:08:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:09,561 INFO L82 PathProgramCache]: Analyzing trace with hash 889577263, now seen corresponding path program 1 times [2020-11-28 03:08:09,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:09,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972227979] [2020-11-28 03:08:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:08:09,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972227979] [2020-11-28 03:08:09,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:08:09,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:08:09,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058547791] [2020-11-28 03:08:09,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:08:09,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:08:09,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:08:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:08:09,818 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-28 03:08:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:08:09,841 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2020-11-28 03:08:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:08:09,843 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-28 03:08:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:08:09,856 INFO L225 Difference]: With dead ends: 22 [2020-11-28 03:08:09,856 INFO L226 Difference]: Without dead ends: 7 [2020-11-28 03:08:09,861 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 [2020-11-28 03:08:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-28 03:08:09,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-28 03:08:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:08:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-11-28 03:08:09,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 6 [2020-11-28 03:08:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:08:09,911 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-11-28 03:08:09,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:08:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-11-28 03:08:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 03:08:09,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:09,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 03:08:09,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:08:09,913 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:08:09,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:09,915 INFO L82 PathProgramCache]: Analyzing trace with hash 889573419, now seen corresponding path program 1 times [2020-11-28 03:08:09,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:09,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486018491] [2020-11-28 03:08:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:10,136 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2020-11-28 03:08:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:08:10,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486018491] [2020-11-28 03:08:10,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:08:10,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:08:10,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798866123] [2020-11-28 03:08:10,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:08:10,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:08:10,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:08:10,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:08:10,146 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 3 states. [2020-11-28 03:08:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:08:10,172 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-11-28 03:08:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:08:10,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-28 03:08:10,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:08:10,176 INFO L225 Difference]: With dead ends: 11 [2020-11-28 03:08:10,176 INFO L226 Difference]: Without dead ends: 8 [2020-11-28 03:08:10,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:08:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-28 03:08:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-28 03:08:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 03:08:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-11-28 03:08:10,182 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-11-28 03:08:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:08:10,184 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-11-28 03:08:10,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:08:10,186 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-11-28 03:08:10,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 03:08:10,187 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:10,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:08:10,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:08:10,190 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:08:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:10,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1807024099, now seen corresponding path program 1 times [2020-11-28 03:08:10,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:10,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530874376] [2020-11-28 03:08:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:08:10,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530874376] [2020-11-28 03:08:10,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634837146] [2020-11-28 03:08:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/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 [2020-11-28 03:08:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:08:10,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:08:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:08:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:08:10,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:08:10,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-28 03:08:10,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205149326] [2020-11-28 03:08:10,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:08:10,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:08:10,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:08:10,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:08:10,586 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-11-28 03:08:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:08:10,647 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-11-28 03:08:10,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:08:10,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-28 03:08:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:08:10,650 INFO L225 Difference]: With dead ends: 12 [2020-11-28 03:08:10,650 INFO L226 Difference]: Without dead ends: 9 [2020-11-28 03:08:10,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:08:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-28 03:08:10,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-28 03:08:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-28 03:08:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-11-28 03:08:10,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-11-28 03:08:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:08:10,656 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-11-28 03:08:10,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:08:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-11-28 03:08:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:08:10,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:08:10,658 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:08:10,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:08:10,887 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:08:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:08:10,888 INFO L82 PathProgramCache]: Analyzing trace with hash 183224107, now seen corresponding path program 2 times [2020-11-28 03:08:10,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:08:10,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615041223] [2020-11-28 03:08:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:08:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:08:10,978 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:08:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:08:11,078 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:08:11,121 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:08:11,121 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:08:11,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:08:11,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:08:11 BoogieIcfgContainer [2020-11-28 03:08:11,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:08:11,159 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:08:11,159 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:08:11,159 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:08:11,160 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:08:09" (3/4) ... [2020-11-28 03:08:11,162 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:08:11,215 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d382be37-e403-4af4-8713-aa93498ce724/bin/uautomizer/witness.graphml [2020-11-28 03:08:11,215 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:08:11,217 INFO L168 Benchmark]: Toolchain (without parser) took 2621.51 ms. Allocated memory is still 117.4 MB. Free memory was 88.1 MB in the beginning and 76.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:11,218 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 75.5 MB. Free memory was 33.9 MB in the beginning and 33.9 MB in the end (delta: 36.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:08:11,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.01 ms. Allocated memory is still 117.4 MB. Free memory was 87.9 MB in the beginning and 95.4 MB in the end (delta: -7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:11,220 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.93 ms. Allocated memory is still 117.4 MB. Free memory was 95.4 MB in the beginning and 94.4 MB in the end (delta: 941.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:08:11,221 INFO L168 Benchmark]: Boogie Preprocessor took 26.43 ms. Allocated memory is still 117.4 MB. Free memory was 94.2 MB in the beginning and 93.2 MB in the end (delta: 974.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:11,222 INFO L168 Benchmark]: RCFGBuilder took 349.69 ms. Allocated memory is still 117.4 MB. Free memory was 93.2 MB in the beginning and 81.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:11,223 INFO L168 Benchmark]: TraceAbstraction took 1739.53 ms. Allocated memory is still 117.4 MB. Free memory was 81.6 MB in the beginning and 78.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:11,224 INFO L168 Benchmark]: Witness Printer took 56.56 ms. Allocated memory is still 117.4 MB. Free memory was 78.4 MB in the beginning and 76.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:08:11,229 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 75.5 MB. Free memory was 33.9 MB in the beginning and 33.9 MB in the end (delta: 36.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 393.01 ms. Allocated memory is still 117.4 MB. Free memory was 87.9 MB in the beginning and 95.4 MB in the end (delta: -7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.93 ms. Allocated memory is still 117.4 MB. Free memory was 95.4 MB in the beginning and 94.4 MB in the end (delta: 941.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.43 ms. Allocated memory is still 117.4 MB. Free memory was 94.2 MB in the beginning and 93.2 MB in the end (delta: 974.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 349.69 ms. Allocated memory is still 117.4 MB. Free memory was 93.2 MB in the beginning and 81.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1739.53 ms. Allocated memory is still 117.4 MB. Free memory was 81.6 MB in the beginning and 78.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * Witness Printer took 56.56 ms. Allocated memory is still 117.4 MB. Free memory was 78.4 MB in the beginning and 76.3 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: - CounterExampleResult [Line: 2]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L5] unsigned char n = __VERIFIER_nondet_uchar(); [L6] COND FALSE !(n == 0) [L9] unsigned char v = 0; [L10] unsigned char s = 0; [L11] unsigned int i = 0; [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i [L12] COND FALSE !(i < n) [L17] COND TRUE s < v [L2] __assert_fail("0", "linear-inequality-inv-b.c", 2, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 0 SDslu, 9 SDs, 0 SdLazy, 11 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 412 SizeOfPredicates, 2 NumberOfNonLiveVariables, 50 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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 incorrect! Received shutdown request...