./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/TerminatorRec02.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-numeric/TerminatorRec02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8c9656c5ef8dceb7982043d8db455c38d2f23147 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/config using search string *Overflow*64bit*_Bitvector*.epf No suitable settings file found using Overflow*64bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:08:46,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:08:46,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:08:46,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:08:46,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:08:46,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:08:46,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:08:46,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:08:46,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:08:46,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:08:46,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:08:46,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:08:46,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:08:46,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:08:46,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:08:46,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:08:46,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:08:46,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:08:46,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:08:46,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:08:46,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:08:46,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:08:46,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:08:46,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:08:46,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:08:46,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:08:46,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:08:46,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:08:46,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:08:46,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:08:46,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:08:46,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:08:46,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:08:46,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:08:46,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:08:46,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:08:46,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:08:46,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:08:46,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:08:46,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:08:46,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:08:46,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-11-29 20:08:46,682 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:08:46,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:08:46,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:08:46,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:08:46,687 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:08:46,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:08:46,688 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 20:08:46,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:08:46,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:08:46,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:08:46,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:08:46,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:08:46,689 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-29 20:08:46,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:08:46,690 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:08:46,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:08:46,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:08:46,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:08:46,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:08:46,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:08:46,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:08:46,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:08:46,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:08:46,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:08:46,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:08:46,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:08:46,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:08:46,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:08:46,693 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_a0a78c53-aff9-40d5-b968-4f4562fd74ad/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c9656c5ef8dceb7982043d8db455c38d2f23147 [2020-11-29 20:08:46,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:08:46,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:08:47,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:08:47,002 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:08:47,002 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:08:47,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/../../sv-benchmarks/c/termination-numeric/TerminatorRec02.c [2020-11-29 20:08:47,079 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/data/7721dc6cd/3ed9ad73749d466287434ee56350b055/FLAGdbd4cc497 [2020-11-29 20:08:47,497 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:08:47,498 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/sv-benchmarks/c/termination-numeric/TerminatorRec02.c [2020-11-29 20:08:47,504 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/data/7721dc6cd/3ed9ad73749d466287434ee56350b055/FLAGdbd4cc497 [2020-11-29 20:08:47,901 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/data/7721dc6cd/3ed9ad73749d466287434ee56350b055 [2020-11-29 20:08:47,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:08:47,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:08:47,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:08:47,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:08:47,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:08:47,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:08:47" (1/1) ... [2020-11-29 20:08:47,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d686ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:47, skipping insertion in model container [2020-11-29 20:08:47,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:08:47" (1/1) ... [2020-11-29 20:08:47,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:08:47,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:08:48,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:08:48,095 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:08:48,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:08:48,120 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:08:48,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48 WrapperNode [2020-11-29 20:08:48,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:08:48,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:08:48,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:08:48,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:08:48,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (1/1) ... [2020-11-29 20:08:48,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (1/1) ... [2020-11-29 20:08:48,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:08:48,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:08:48,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:08:48,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:08:48,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (1/1) ... [2020-11-29 20:08:48,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (1/1) ... [2020-11-29 20:08:48,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (1/1) ... [2020-11-29 20:08:48,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (1/1) ... [2020-11-29 20:08:48,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (1/1) ... [2020-11-29 20:08:48,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (1/1) ... [2020-11-29 20:08:48,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (1/1) ... [2020-11-29 20:08:48,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:08:48,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:08:48,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:08:48,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:08:48,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:08:48,293 INFO L130 BoogieDeclarations]: Found specification of procedure fact [2020-11-29 20:08:48,293 INFO L138 BoogieDeclarations]: Found implementation of procedure fact [2020-11-29 20:08:48,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:08:48,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:08:50,513 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:08:50,514 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-29 20:08:50,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:08:50 BoogieIcfgContainer [2020-11-29 20:08:50,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:08:50,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:08:50,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:08:50,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:08:50,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:08:47" (1/3) ... [2020-11-29 20:08:50,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33055300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:08:50, skipping insertion in model container [2020-11-29 20:08:50,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:08:48" (2/3) ... [2020-11-29 20:08:50,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33055300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:08:50, skipping insertion in model container [2020-11-29 20:08:50,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:08:50" (3/3) ... [2020-11-29 20:08:50,524 INFO L111 eAbstractionObserver]: Analyzing ICFG TerminatorRec02.c [2020-11-29 20:08:50,534 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:08:50,538 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-29 20:08:50,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-29 20:08:50,571 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:08:50,571 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:08:50,572 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:08:50,572 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:08:50,572 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:08:50,572 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:08:50,572 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:08:50,572 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:08:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-29 20:08:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 20:08:50,591 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:08:50,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:08:50,592 INFO L429 AbstractCegarLoop]: === Iteration 1 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:08:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:08:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash 306322899, now seen corresponding path program 1 times [2020-11-29 20:08:50,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:08:50,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028384894] [2020-11-29 20:08:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:08:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:08:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:08:50,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028384894] [2020-11-29 20:08:50,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:08:50,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:08:50,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978942931] [2020-11-29 20:08:50,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:08:50,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:08:50,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:08:50,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:08:50,876 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-11-29 20:08:51,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:08:51,045 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-29 20:08:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:08:51,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-29 20:08:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:08:51,054 INFO L225 Difference]: With dead ends: 22 [2020-11-29 20:08:51,054 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 20:08:51,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:08:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 20:08:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 20:08:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 20:08:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-29 20:08:51,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 7 [2020-11-29 20:08:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:08:51,089 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-29 20:08:51,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:08:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-29 20:08:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 20:08:51,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:08:51,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:08:51,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:08:51,091 INFO L429 AbstractCegarLoop]: === Iteration 2 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:08:51,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:08:51,092 INFO L82 PathProgramCache]: Analyzing trace with hash 906075314, now seen corresponding path program 1 times [2020-11-29 20:08:51,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:08:51,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158888596] [2020-11-29 20:08:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:08:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:08:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:08:51,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158888596] [2020-11-29 20:08:51,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:08:51,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:08:51,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825251370] [2020-11-29 20:08:51,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:08:51,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:08:51,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:08:51,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:08:51,142 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 3 states. [2020-11-29 20:08:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:08:53,218 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-11-29 20:08:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:08:53,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-29 20:08:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:08:53,221 INFO L225 Difference]: With dead ends: 19 [2020-11-29 20:08:53,221 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 20:08:53,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:08:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 20:08:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-11-29 20:08:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 20:08:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-29 20:08:53,227 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2020-11-29 20:08:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:08:53,227 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-29 20:08:53,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:08:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-29 20:08:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 20:08:53,228 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:08:53,228 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:08:53,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:08:53,228 INFO L429 AbstractCegarLoop]: === Iteration 3 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:08:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:08:53,229 INFO L82 PathProgramCache]: Analyzing trace with hash -484212048, now seen corresponding path program 1 times [2020-11-29 20:08:53,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:08:53,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198651850] [2020-11-29 20:08:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:08:53,243 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:08:53,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437515908] [2020-11-29 20:08:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:08:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:08:53,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:08:53,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:08:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:08:53,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198651850] [2020-11-29 20:08:53,435 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:08:53,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437515908] [2020-11-29 20:08:53,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:08:53,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 20:08:53,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535044451] [2020-11-29 20:08:53,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:08:53,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:08:53,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:08:53,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:08:53,437 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2020-11-29 20:08:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:08:55,804 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-29 20:08:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:08:55,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-29 20:08:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:08:55,806 INFO L225 Difference]: With dead ends: 25 [2020-11-29 20:08:55,806 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 20:08:55,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:08:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 20:08:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-11-29 20:08:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 20:08:55,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-29 20:08:55,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-11-29 20:08:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:08:55,813 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-29 20:08:55,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:08:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-29 20:08:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 20:08:55,814 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:08:55,814 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:08:56,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 20:08:56,015 INFO L429 AbstractCegarLoop]: === Iteration 4 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:08:56,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:08:56,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2125671557, now seen corresponding path program 1 times [2020-11-29 20:08:56,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:08:56,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37348870] [2020-11-29 20:08:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:08:56,024 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:08:56,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464958302] [2020-11-29 20:08:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:08:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:08:56,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 20:08:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:08:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:08:56,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37348870] [2020-11-29 20:08:56,110 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:08:56,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464958302] [2020-11-29 20:08:56,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:08:56,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:08:56,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919040601] [2020-11-29 20:08:56,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:08:56,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:08:56,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:08:56,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:08:56,112 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-11-29 20:08:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:08:56,253 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-11-29 20:08:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:08:56,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-29 20:08:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:08:56,254 INFO L225 Difference]: With dead ends: 20 [2020-11-29 20:08:56,254 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 20:08:56,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:08:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 20:08:56,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-29 20:08:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-29 20:08:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-11-29 20:08:56,258 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-11-29 20:08:56,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:08:56,258 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-11-29 20:08:56,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:08:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-11-29 20:08:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 20:08:56,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:08:56,260 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:08:56,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:08:56,464 INFO L429 AbstractCegarLoop]: === Iteration 5 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:08:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:08:56,464 INFO L82 PathProgramCache]: Analyzing trace with hash 60377040, now seen corresponding path program 1 times [2020-11-29 20:08:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:08:56,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222460725] [2020-11-29 20:08:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:08:56,484 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:08:56,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552628892] [2020-11-29 20:08:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/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 [2020-11-29 20:08:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:08:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 20:08:56,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:08:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 20:08:56,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222460725] [2020-11-29 20:08:56,688 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:08:56,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552628892] [2020-11-29 20:08:56,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:08:56,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-29 20:08:56,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276299042] [2020-11-29 20:08:56,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:08:56,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:08:56,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:08:56,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:08:56,690 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 11 states. [2020-11-29 20:08:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:08:57,068 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-29 20:08:57,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:08:57,069 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-11-29 20:08:57,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:08:57,070 INFO L225 Difference]: With dead ends: 28 [2020-11-29 20:08:57,070 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 20:08:57,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:08:57,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 20:08:57,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-11-29 20:08:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 20:08:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-29 20:08:57,077 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 30 [2020-11-29 20:08:57,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:08:57,077 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-29 20:08:57,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:08:57,077 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-29 20:08:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 20:08:57,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:08:57,079 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:08:57,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:08:57,296 INFO L429 AbstractCegarLoop]: === Iteration 6 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:08:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:08:57,296 INFO L82 PathProgramCache]: Analyzing trace with hash -511805776, now seen corresponding path program 2 times [2020-11-29 20:08:57,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:08:57,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118707126] [2020-11-29 20:08:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:08:57,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:08:57,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672397517] [2020-11-29 20:08:57,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:08:57,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:08:57,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:08:57,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:08:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:08:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 20:08:57,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118707126] [2020-11-29 20:08:57,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:08:57,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672397517] [2020-11-29 20:08:57,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:08:57,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 20:08:57,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207836342] [2020-11-29 20:08:57,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:08:57,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:08:57,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:08:57,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:08:57,851 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 14 states. [2020-11-29 20:08:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:08:58,399 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-11-29 20:08:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:08:58,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-11-29 20:08:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:08:58,401 INFO L225 Difference]: With dead ends: 33 [2020-11-29 20:08:58,401 INFO L226 Difference]: Without dead ends: 32 [2020-11-29 20:08:58,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:08:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-29 20:08:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-11-29 20:08:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 20:08:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-29 20:08:58,407 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 35 [2020-11-29 20:08:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:08:58,408 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-29 20:08:58,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:08:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-29 20:08:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-29 20:08:58,409 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:08:58,409 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-11-29 20:08:58,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:08:58,612 INFO L429 AbstractCegarLoop]: === Iteration 7 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:08:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:08:58,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1042885680, now seen corresponding path program 3 times [2020-11-29 20:08:58,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:08:58,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790730522] [2020-11-29 20:08:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:08:58,621 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 20:08:58,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717164234] [2020-11-29 20:08:58,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0a78c53-aff9-40d5-b968-4f4562fd74ad/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:08:58,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-29 20:08:58,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:08:58,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-29 20:08:58,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:10:30,399 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-11-29 20:10:30,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790730522] [2020-11-29 20:10:30,400 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 20:10:30,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717164234] [2020-11-29 20:10:30,401 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-11-29 20:10:30,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:10:30,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-11-29 20:10:30,401 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-11-29 20:10:30,401 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:10:30,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 20:10:30,621 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-29 20:10:30,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:10:30 BoogieIcfgContainer [2020-11-29 20:10:30,621 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:10:30,622 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:10:30,622 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:10:30,622 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:10:30,623 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:08:50" (3/4) ... [2020-11-29 20:10:30,626 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 20:10:30,626 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:10:30,627 INFO L168 Benchmark]: Toolchain (without parser) took 102721.08 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 54.5 MB in the beginning and 86.6 MB in the end (delta: -32.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:10:30,628 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 113.2 MB. Free memory is still 70.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:10:30,628 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.90 ms. Allocated memory is still 113.2 MB. Free memory was 54.3 MB in the beginning and 92.0 MB in the end (delta: -37.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2020-11-29 20:10:30,629 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.43 ms. Allocated memory is still 113.2 MB. Free memory was 92.0 MB in the beginning and 90.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:10:30,629 INFO L168 Benchmark]: Boogie Preprocessor took 22.45 ms. Allocated memory is still 113.2 MB. Free memory was 90.5 MB in the beginning and 89.9 MB in the end (delta: 577.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:10:30,630 INFO L168 Benchmark]: RCFGBuilder took 2320.75 ms. Allocated memory is still 113.2 MB. Free memory was 89.9 MB in the beginning and 79.0 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:10:30,631 INFO L168 Benchmark]: TraceAbstraction took 100104.41 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 78.5 MB in the beginning and 86.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:10:30,631 INFO L168 Benchmark]: Witness Printer took 3.99 ms. Allocated memory is still 136.3 MB. Free memory is still 86.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:10:30,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 113.2 MB. Free memory is still 70.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 213.90 ms. Allocated memory is still 113.2 MB. Free memory was 54.3 MB in the beginning and 92.0 MB in the end (delta: -37.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.43 ms. Allocated memory is still 113.2 MB. Free memory was 92.0 MB in the beginning and 90.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.45 ms. Allocated memory is still 113.2 MB. Free memory was 90.5 MB in the beginning and 89.9 MB in the end (delta: 577.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2320.75 ms. Allocated memory is still 113.2 MB. Free memory was 89.9 MB in the beginning and 79.0 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 100104.41 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 78.5 MB in the beginning and 86.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.99 ms. Allocated memory is still 136.3 MB. Free memory is still 86.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 20]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] int x = __VERIFIER_nondet_int(); [L27] COND FALSE !(x < 0) [L29] int y = __VERIFIER_nondet_int(); [L30] COND FALSE !(y < 0) [L32] int z = __VERIFIER_nondet_int(); [L33] CALL fact(x) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND FALSE !(x > 1) [L22] return 1; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] y * x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 100.0s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 131 SDslu, 162 SDs, 0 SdLazy, 349 SolverSat, 46 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=6, 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, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 105 ConstructedInterpolants, 4 QuantifiedInterpolants, 13090 SizeOfPredicates, 9 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 34/63 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...