./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/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 32bit --witnessprinter.graph.data.programhash f919edf50b278085ea884360d609205059ef996b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:21:05,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:21:05,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:21:05,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:21:05,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:21:05,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:21:06,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:21:06,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:21:06,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:21:06,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:21:06,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:21:06,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:21:06,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:21:06,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:21:06,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:21:06,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:21:06,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:21:06,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:21:06,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:21:06,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:21:06,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:21:06,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:21:06,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:21:06,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:21:06,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:21:06,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:21:06,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:21:06,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:21:06,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:21:06,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:21:06,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:21:06,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:21:06,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:21:06,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:21:06,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:21:06,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:21:06,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:21:06,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:21:06,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:21:06,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:21:06,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:21:06,121 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2020-11-28 03:21:06,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:21:06,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:21:06,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:21:06,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:21:06,171 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:21:06,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:21:06,172 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:21:06,172 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:21:06,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:21:06,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:21:06,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:21:06,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:21:06,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:21:06,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:21:06,176 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 03:21:06,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:21:06,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:21:06,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:21:06,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:21:06,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:21:06,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:21:06,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:21:06,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:21:06,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:21:06,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:21:06,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:21:06,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:21:06,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:21:06,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:21:06,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:21:06,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:21:06,181 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_16dbe37f-7e03-4200-96e1-88669e9eb25b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f919edf50b278085ea884360d609205059ef996b [2020-11-28 03:21:06,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:21:06,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:21:06,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:21:06,598 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:21:06,599 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:21:06,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2020-11-28 03:21:06,683 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/data/c896e6e9e/a4e56a2a571c4e86a632f6b6e89913e4/FLAG22c06c841 [2020-11-28 03:21:07,352 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:21:07,354 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2020-11-28 03:21:07,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/data/c896e6e9e/a4e56a2a571c4e86a632f6b6e89913e4/FLAG22c06c841 [2020-11-28 03:21:07,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/data/c896e6e9e/a4e56a2a571c4e86a632f6b6e89913e4 [2020-11-28 03:21:07,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:21:07,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:21:07,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:07,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:21:07,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:21:07,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:07" (1/1) ... [2020-11-28 03:21:07,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27409626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:07, skipping insertion in model container [2020-11-28 03:21:07,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:21:07" (1/1) ... [2020-11-28 03:21:07,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:21:07,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:21:07,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:08,003 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:21:08,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:21:08,046 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:21:08,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08 WrapperNode [2020-11-28 03:21:08,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:21:08,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:21:08,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:21:08,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:21:08,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (1/1) ... [2020-11-28 03:21:08,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (1/1) ... [2020-11-28 03:21:08,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:21:08,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:21:08,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:21:08,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:21:08,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (1/1) ... [2020-11-28 03:21:08,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (1/1) ... [2020-11-28 03:21:08,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (1/1) ... [2020-11-28 03:21:08,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (1/1) ... [2020-11-28 03:21:08,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (1/1) ... [2020-11-28 03:21:08,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (1/1) ... [2020-11-28 03:21:08,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (1/1) ... [2020-11-28 03:21:08,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:21:08,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:21:08,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:21:08,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:21:08,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/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 03:21:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:21:08,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:21:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:21:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-28 03:21:08,221 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-28 03:21:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:21:08,735 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:21:08,735 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:21:08,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:08 BoogieIcfgContainer [2020-11-28 03:21:08,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:21:08,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:21:08,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:21:08,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:21:08,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:21:07" (1/3) ... [2020-11-28 03:21:08,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65842a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:08, skipping insertion in model container [2020-11-28 03:21:08,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:21:08" (2/3) ... [2020-11-28 03:21:08,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65842a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:21:08, skipping insertion in model container [2020-11-28 03:21:08,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:08" (3/3) ... [2020-11-28 03:21:08,748 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-11-28 03:21:08,761 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:21:08,766 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:21:08,780 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:21:08,808 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:21:08,809 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:21:08,809 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:21:08,809 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:21:08,809 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:21:08,809 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:21:08,809 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:21:08,810 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:21:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-28 03:21:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:21:08,839 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:08,840 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:08,841 INFO L429 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:21:08,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:08,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1299019465, now seen corresponding path program 1 times [2020-11-28 03:21:08,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:08,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887514718] [2020-11-28 03:21:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:09,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:21:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:21:09,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887514718] [2020-11-28 03:21:09,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:09,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:21:09,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405295068] [2020-11-28 03:21:09,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:09,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:09,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:09,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:09,274 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 4 states. [2020-11-28 03:21:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:09,351 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-11-28 03:21:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:09,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 03:21:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:09,373 INFO L225 Difference]: With dead ends: 31 [2020-11-28 03:21:09,378 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:21:09,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:21:09,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 03:21:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 03:21:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-28 03:21:09,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2020-11-28 03:21:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:09,437 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-28 03:21:09,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-28 03:21:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:21:09,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:09,441 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:09,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:21:09,441 INFO L429 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:21:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1393213329, now seen corresponding path program 1 times [2020-11-28 03:21:09,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:09,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877046145] [2020-11-28 03:21:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:09,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:21:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:09,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:21:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:21:09,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877046145] [2020-11-28 03:21:09,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:09,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:21:09,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580531946] [2020-11-28 03:21:09,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:21:09,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:09,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:21:09,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:09,650 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-11-28 03:21:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:09,699 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-28 03:21:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:21:09,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-11-28 03:21:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:09,703 INFO L225 Difference]: With dead ends: 30 [2020-11-28 03:21:09,703 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 03:21:09,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:21:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 03:21:09,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-11-28 03:21:09,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:21:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-28 03:21:09,715 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 21 [2020-11-28 03:21:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:09,717 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-28 03:21:09,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:21:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-28 03:21:09,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:21:09,720 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:09,721 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:09,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:21:09,722 INFO L429 AbstractCegarLoop]: === Iteration 3 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:21:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:09,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1392289808, now seen corresponding path program 1 times [2020-11-28 03:21:09,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:09,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026127974] [2020-11-28 03:21:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:09,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:21:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:09,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:21:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:21:09,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026127974] [2020-11-28 03:21:09,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42637989] [2020-11-28 03:21:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/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 03:21:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:10,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:21:10,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:21:10,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:21:10,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-28 03:21:10,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129351892] [2020-11-28 03:21:10,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:21:10,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:10,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:21:10,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:21:10,103 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2020-11-28 03:21:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:10,175 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-28 03:21:10,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:21:10,175 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-11-28 03:21:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:10,177 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:21:10,177 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 03:21:10,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:21:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 03:21:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-11-28 03:21:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 03:21:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-28 03:21:10,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-11-28 03:21:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:10,184 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-28 03:21:10,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:21:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-28 03:21:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:21:10,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:10,186 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:10,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:21:10,387 INFO L429 AbstractCegarLoop]: === Iteration 4 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:21:10,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:10,387 INFO L82 PathProgramCache]: Analyzing trace with hash -520713946, now seen corresponding path program 1 times [2020-11-28 03:21:10,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:10,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40054977] [2020-11-28 03:21:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:10,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:21:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:10,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:21:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 03:21:10,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40054977] [2020-11-28 03:21:10,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:10,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:21:10,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650856132] [2020-11-28 03:21:10,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:21:10,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:10,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:21:10,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:21:10,480 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 3 states. [2020-11-28 03:21:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:10,491 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-28 03:21:10,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:21:10,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-11-28 03:21:10,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:10,493 INFO L225 Difference]: With dead ends: 24 [2020-11-28 03:21:10,493 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 03:21:10,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:21:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 03:21:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-28 03:21:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 03:21:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-28 03:21:10,498 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 25 [2020-11-28 03:21:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:10,498 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-28 03:21:10,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:21:10,499 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-28 03:21:10,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-28 03:21:10,500 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:21:10,500 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:21:10,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:21:10,501 INFO L429 AbstractCegarLoop]: === Iteration 5 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:21:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1425665596, now seen corresponding path program 1 times [2020-11-28 03:21:10,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:21:10,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122392292] [2020-11-28 03:21:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:21:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:10,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:21:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:10,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:21:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:10,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:21:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-28 03:21:10,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122392292] [2020-11-28 03:21:10,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:21:10,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:21:10,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801982143] [2020-11-28 03:21:10,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:21:10,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:10,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:21:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:10,579 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2020-11-28 03:21:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:10,591 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-11-28 03:21:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:21:10,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-28 03:21:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:21:10,593 INFO L225 Difference]: With dead ends: 23 [2020-11-28 03:21:10,593 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:21:10,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:21:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:21:10,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:21:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:21:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:21:10,594 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-11-28 03:21:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:21:10,595 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:21:10,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:21:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:21:10,595 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:21:10,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:21:10,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:21:10,611 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:21:10,611 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:21:10,611 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:21:10,611 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:21:10,611 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-11-28 03:21:10,611 INFO L274 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-11-28 03:21:10,612 INFO L277 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-11-28 03:21:10,612 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-28 03:21:10,612 INFO L274 CegarLoopResult]: For program point L13(lines 13 19) no Hoare annotation was computed. [2020-11-28 03:21:10,612 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-28 03:21:10,612 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2020-11-28 03:21:10,612 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2020-11-28 03:21:10,612 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-11-28 03:21:10,613 INFO L274 CegarLoopResult]: For program point idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 8) no Hoare annotation was computed. [2020-11-28 03:21:10,613 INFO L274 CegarLoopResult]: For program point idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 8) no Hoare annotation was computed. [2020-11-28 03:21:10,613 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-11-28 03:21:10,613 INFO L277 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-11-28 03:21:10,613 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-28 03:21:10,613 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-11-28 03:21:10,613 INFO L274 CegarLoopResult]: For program point L8-2(line 8) no Hoare annotation was computed. [2020-11-28 03:21:10,613 INFO L274 CegarLoopResult]: For program point L8-3(line 8) no Hoare annotation was computed. [2020-11-28 03:21:10,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:21:10 BoogieIcfgContainer [2020-11-28 03:21:10,618 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:21:10,619 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:21:10,619 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:21:10,619 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:21:10,619 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:21:08" (3/4) ... [2020-11-28 03:21:10,622 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:21:10,628 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-11-28 03:21:10,632 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 03:21:10,632 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:21:10,632 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:21:10,633 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:21:10,667 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_16dbe37f-7e03-4200-96e1-88669e9eb25b/bin/uautomizer/witness.graphml [2020-11-28 03:21:10,667 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:21:10,669 INFO L168 Benchmark]: Toolchain (without parser) took 2949.54 ms. Allocated memory was 83.9 MB in the beginning and 117.4 MB in the end (delta: 33.6 MB). Free memory was 53.8 MB in the beginning and 53.9 MB in the end (delta: -55.9 kB). Peak memory consumption was 32.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:10,670 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory was 43.5 MB in the beginning and 43.5 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:10,670 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.64 ms. Allocated memory is still 83.9 MB. Free memory was 53.6 MB in the beginning and 61.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:10,671 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.97 ms. Allocated memory is still 83.9 MB. Free memory was 61.8 MB in the beginning and 60.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:10,671 INFO L168 Benchmark]: Boogie Preprocessor took 36.65 ms. Allocated memory is still 83.9 MB. Free memory was 60.5 MB in the beginning and 59.5 MB in the end (delta: 941.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:10,672 INFO L168 Benchmark]: RCFGBuilder took 600.04 ms. Allocated memory is still 83.9 MB. Free memory was 59.2 MB in the beginning and 47.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:10,672 INFO L168 Benchmark]: TraceAbstraction took 1878.95 ms. Allocated memory was 83.9 MB in the beginning and 117.4 MB in the end (delta: 33.6 MB). Free memory was 47.5 MB in the beginning and 57.0 MB in the end (delta: -9.5 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:10,673 INFO L168 Benchmark]: Witness Printer took 48.81 ms. Allocated memory is still 117.4 MB. Free memory was 57.0 MB in the beginning and 53.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:10,676 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory was 43.5 MB in the beginning and 43.5 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 324.64 ms. Allocated memory is still 83.9 MB. Free memory was 53.6 MB in the beginning and 61.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.97 ms. Allocated memory is still 83.9 MB. Free memory was 61.8 MB in the beginning and 60.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.65 ms. Allocated memory is still 83.9 MB. Free memory was 60.5 MB in the beginning and 59.5 MB in the end (delta: 941.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 600.04 ms. Allocated memory is still 83.9 MB. Free memory was 59.2 MB in the beginning and 47.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1878.95 ms. Allocated memory was 83.9 MB in the beginning and 117.4 MB in the end (delta: 33.6 MB). Free memory was 47.5 MB in the beginning and 57.0 MB in the end (delta: -9.5 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Witness Printer took 48.81 ms. Allocated memory is still 117.4 MB. Free memory was 57.0 MB in the beginning and 53.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 8]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 10 SDslu, 129 SDs, 0 SdLazy, 70 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 4290 SizeOfPredicates, 1 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 76/84 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...