./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.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_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/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 457415f9b28998cf0ba7f80d69eaf14873f5a98f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 03:17:56,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:17:56,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:17:56,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:17:56,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:17:56,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:17:56,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:17:56,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:17:56,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:17:56,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:17:56,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:17:56,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:17:56,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:17:56,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:17:56,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:17:56,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:17:56,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:17:56,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:17:56,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:17:56,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:17:56,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:17:56,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:17:56,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:17:56,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:17:56,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:17:56,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:17:56,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:17:56,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:17:56,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:17:56,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:17:56,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:17:56,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:17:56,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:17:56,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:17:56,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:17:56,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:17:56,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:17:56,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:17:56,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:17:56,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:17:56,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:17:56,392 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-11-28 03:17:56,443 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:17:56,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:17:56,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:17:56,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:17:56,446 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:17:56,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:17:56,447 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:17:56,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:17:56,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:17:56,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:17:56,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:17:56,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:17:56,449 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 03:17:56,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:17:56,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:17:56,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:17:56,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:17:56,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:17:56,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:17:56,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:17:56,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:17:56,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:17:56,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:17:56,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:17:56,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:17:56,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:17:56,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:17:56,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:17:56,454 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_7332596d-a63b-4f2d-a871-77da3708c108/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 457415f9b28998cf0ba7f80d69eaf14873f5a98f [2020-11-28 03:17:56,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:17:56,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:17:56,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:17:56,877 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:17:56,879 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:17:56,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2020-11-28 03:17:56,976 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/data/8b832112e/a6fce97e58d24c67b7d302ab1e2c0b25/FLAGd0eceea39 [2020-11-28 03:17:57,538 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:17:57,539 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2020-11-28 03:17:57,548 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/data/8b832112e/a6fce97e58d24c67b7d302ab1e2c0b25/FLAGd0eceea39 [2020-11-28 03:17:57,895 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/data/8b832112e/a6fce97e58d24c67b7d302ab1e2c0b25 [2020-11-28 03:17:57,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:17:57,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:17:57,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:17:57,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:17:57,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:17:57,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:17:57" (1/1) ... [2020-11-28 03:17:57,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218ae57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:57, skipping insertion in model container [2020-11-28 03:17:57,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:17:57" (1/1) ... [2020-11-28 03:17:57,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:17:57,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:17:58,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:17:58,149 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:17:58,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:17:58,198 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:17:58,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58 WrapperNode [2020-11-28 03:17:58,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:17:58,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:17:58,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:17:58,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:17:58,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (1/1) ... [2020-11-28 03:17:58,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (1/1) ... [2020-11-28 03:17:58,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:17:58,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:17:58,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:17:58,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:17:58,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (1/1) ... [2020-11-28 03:17:58,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (1/1) ... [2020-11-28 03:17:58,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (1/1) ... [2020-11-28 03:17:58,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (1/1) ... [2020-11-28 03:17:58,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (1/1) ... [2020-11-28 03:17:58,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (1/1) ... [2020-11-28 03:17:58,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (1/1) ... [2020-11-28 03:17:58,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:17:58,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:17:58,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:17:58,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:17:58,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/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 03:17:58,378 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-11-28 03:17:58,379 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-11-28 03:17:58,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:17:58,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:17:58,763 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:17:58,778 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-28 03:17:58,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:58 BoogieIcfgContainer [2020-11-28 03:17:58,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:17:58,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:17:58,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:17:58,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:17:58,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:17:57" (1/3) ... [2020-11-28 03:17:58,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6b8914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:17:58, skipping insertion in model container [2020-11-28 03:17:58,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:58" (2/3) ... [2020-11-28 03:17:58,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6b8914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:17:58, skipping insertion in model container [2020-11-28 03:17:58,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:58" (3/3) ... [2020-11-28 03:17:58,792 INFO L111 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex5.c [2020-11-28 03:17:58,813 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:17:58,835 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-28 03:17:58,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-28 03:17:58,878 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:17:58,879 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:17:58,879 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:17:58,879 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:17:58,879 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:17:58,880 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:17:58,880 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:17:58,880 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:17:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-28 03:17:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 03:17:58,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:58,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:58,905 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:17:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1461861353, now seen corresponding path program 1 times [2020-11-28 03:17:58,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:58,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150330837] [2020-11-28 03:17:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:59,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150330837] [2020-11-28 03:17:59,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:59,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:17:59,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710552547] [2020-11-28 03:17:59,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:17:59,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:59,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:17:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:59,170 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-11-28 03:17:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:59,368 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-11-28 03:17:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:17:59,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-28 03:17:59,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:59,380 INFO L225 Difference]: With dead ends: 44 [2020-11-28 03:17:59,380 INFO L226 Difference]: Without dead ends: 28 [2020-11-28 03:17:59,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:17:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-28 03:17:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-11-28 03:17:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 03:17:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-28 03:17:59,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2020-11-28 03:17:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:59,438 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-28 03:17:59,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:17:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-28 03:17:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 03:17:59,439 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:59,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:59,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:17:59,440 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:17:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1461861577, now seen corresponding path program 1 times [2020-11-28 03:17:59,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:59,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390032256] [2020-11-28 03:17:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:59,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390032256] [2020-11-28 03:17:59,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:59,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:17:59,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432467695] [2020-11-28 03:17:59,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:17:59,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:59,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:17:59,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:59,519 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-11-28 03:17:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:59,608 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-28 03:17:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:17:59,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-28 03:17:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:59,610 INFO L225 Difference]: With dead ends: 34 [2020-11-28 03:17:59,610 INFO L226 Difference]: Without dead ends: 33 [2020-11-28 03:17:59,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:17:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-28 03:17:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-11-28 03:17:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 03:17:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-11-28 03:17:59,620 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2020-11-28 03:17:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:59,621 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-11-28 03:17:59,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:17:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-11-28 03:17:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:17:59,622 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:59,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:59,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:17:59,623 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:17:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:59,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1926938272, now seen corresponding path program 1 times [2020-11-28 03:17:59,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:59,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433197910] [2020-11-28 03:17:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:59,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433197910] [2020-11-28 03:17:59,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:59,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:59,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266494937] [2020-11-28 03:17:59,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:17:59,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:59,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:17:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:59,683 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-11-28 03:17:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:59,759 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-11-28 03:17:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:17:59,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-28 03:17:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:59,762 INFO L225 Difference]: With dead ends: 33 [2020-11-28 03:17:59,762 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 03:17:59,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:17:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 03:17:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-11-28 03:17:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:17:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-28 03:17:59,780 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2020-11-28 03:17:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:59,781 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-28 03:17:59,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:17:59,781 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-28 03:17:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:17:59,782 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:59,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:59,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:17:59,782 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:17:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:59,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1926931321, now seen corresponding path program 1 times [2020-11-28 03:17:59,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:59,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61742332] [2020-11-28 03:17:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:59,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61742332] [2020-11-28 03:17:59,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:59,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:59,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930230388] [2020-11-28 03:17:59,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:17:59,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:59,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:17:59,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:59,856 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-11-28 03:17:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:59,936 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-28 03:17:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:17:59,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-28 03:17:59,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:59,939 INFO L225 Difference]: With dead ends: 32 [2020-11-28 03:17:59,939 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 03:17:59,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:17:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 03:17:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-28 03:17:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 03:17:59,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-11-28 03:17:59,952 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2020-11-28 03:17:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:59,953 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-11-28 03:17:59,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:17:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-11-28 03:17:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:17:59,955 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:59,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:59,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:17:59,957 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:17:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:59,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1954337320, now seen corresponding path program 1 times [2020-11-28 03:17:59,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:59,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661362956] [2020-11-28 03:17:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:00,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661362956] [2020-11-28 03:18:00,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377380905] [2020-11-28 03:18:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/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 03:18:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:00,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:18:00,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:00,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:18:00,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2020-11-28 03:18:00,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820213088] [2020-11-28 03:18:00,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:18:00,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:00,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:18:00,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:18:00,289 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-11-28 03:18:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:00,453 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-11-28 03:18:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:18:00,453 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-28 03:18:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:00,455 INFO L225 Difference]: With dead ends: 43 [2020-11-28 03:18:00,455 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 03:18:00,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:18:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 03:18:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-11-28 03:18:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 03:18:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-11-28 03:18:00,465 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 13 [2020-11-28 03:18:00,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:00,465 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-11-28 03:18:00,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:18:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-11-28 03:18:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:18:00,466 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:00,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:00,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:00,668 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:00,668 INFO L82 PathProgramCache]: Analyzing trace with hash -906050173, now seen corresponding path program 1 times [2020-11-28 03:18:00,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:00,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388823642] [2020-11-28 03:18:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:00,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388823642] [2020-11-28 03:18:00,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234507692] [2020-11-28 03:18:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/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 [2020-11-28 03:18:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:00,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:18:00,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:00,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:00,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-28 03:18:00,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095004643] [2020-11-28 03:18:00,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:18:00,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:00,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:18:00,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:18:00,852 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2020-11-28 03:18:01,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:01,144 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-11-28 03:18:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:18:01,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-11-28 03:18:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:01,148 INFO L225 Difference]: With dead ends: 75 [2020-11-28 03:18:01,148 INFO L226 Difference]: Without dead ends: 73 [2020-11-28 03:18:01,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:18:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-28 03:18:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-11-28 03:18:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:18:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-11-28 03:18:01,172 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 13 [2020-11-28 03:18:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:01,173 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-11-28 03:18:01,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:18:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-11-28 03:18:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:18:01,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:01,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:01,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:01,406 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:01,407 INFO L82 PathProgramCache]: Analyzing trace with hash -906049949, now seen corresponding path program 1 times [2020-11-28 03:18:01,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:01,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564101575] [2020-11-28 03:18:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:01,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564101575] [2020-11-28 03:18:01,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077495558] [2020-11-28 03:18:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/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 [2020-11-28 03:18:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:01,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:18:01,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:01,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:01,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-28 03:18:01,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709163401] [2020-11-28 03:18:01,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:18:01,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:01,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:18:01,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:18:01,567 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 7 states. [2020-11-28 03:18:01,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:01,827 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-11-28 03:18:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:18:01,828 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-11-28 03:18:01,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:01,829 INFO L225 Difference]: With dead ends: 67 [2020-11-28 03:18:01,829 INFO L226 Difference]: Without dead ends: 65 [2020-11-28 03:18:01,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:18:01,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-28 03:18:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 21. [2020-11-28 03:18:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 03:18:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-28 03:18:01,837 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-11-28 03:18:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:01,837 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-28 03:18:01,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:18:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-28 03:18:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:18:01,839 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:01,839 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:02,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:02,058 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:02,059 INFO L82 PathProgramCache]: Analyzing trace with hash 454907873, now seen corresponding path program 1 times [2020-11-28 03:18:02,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:02,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767516042] [2020-11-28 03:18:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:02,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767516042] [2020-11-28 03:18:02,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934923805] [2020-11-28 03:18:02,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/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 [2020-11-28 03:18:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:02,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:18:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:02,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:02,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-28 03:18:02,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681854741] [2020-11-28 03:18:02,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:18:02,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:02,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:18:02,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:18:02,227 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2020-11-28 03:18:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:02,323 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-11-28 03:18:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:18:02,327 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-28 03:18:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:02,327 INFO L225 Difference]: With dead ends: 34 [2020-11-28 03:18:02,328 INFO L226 Difference]: Without dead ends: 33 [2020-11-28 03:18:02,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:18:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-28 03:18:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-11-28 03:18:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:18:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-28 03:18:02,336 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 14 [2020-11-28 03:18:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:02,336 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-28 03:18:02,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:18:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-28 03:18:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:18:02,337 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:02,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:02,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:02,550 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:02,551 INFO L82 PathProgramCache]: Analyzing trace with hash 454914824, now seen corresponding path program 1 times [2020-11-28 03:18:02,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:02,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131420992] [2020-11-28 03:18:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:02,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131420992] [2020-11-28 03:18:02,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033615668] [2020-11-28 03:18:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/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 [2020-11-28 03:18:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:02,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:18:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:02,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:18:02,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2020-11-28 03:18:02,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680888885] [2020-11-28 03:18:02,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:18:02,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:02,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:18:02,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:18:02,748 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-11-28 03:18:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:02,860 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-11-28 03:18:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:18:02,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-28 03:18:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:02,861 INFO L225 Difference]: With dead ends: 38 [2020-11-28 03:18:02,862 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 03:18:02,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:18:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 03:18:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-11-28 03:18:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 03:18:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-11-28 03:18:02,876 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2020-11-28 03:18:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:02,877 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-11-28 03:18:02,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:18:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-11-28 03:18:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:18:02,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:02,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:03,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:03,106 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1977215750, now seen corresponding path program 1 times [2020-11-28 03:18:03,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:03,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132389064] [2020-11-28 03:18:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:03,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132389064] [2020-11-28 03:18:03,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434010923] [2020-11-28 03:18:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-28 03:18:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:03,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:03,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:03,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:03,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-28 03:18:03,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015958724] [2020-11-28 03:18:03,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:18:03,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:03,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:18:03,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:18:03,268 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-11-28 03:18:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:03,428 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-11-28 03:18:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:18:03,428 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-28 03:18:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:03,429 INFO L225 Difference]: With dead ends: 44 [2020-11-28 03:18:03,429 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 03:18:03,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:18:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 03:18:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2020-11-28 03:18:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 03:18:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-11-28 03:18:03,437 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 14 [2020-11-28 03:18:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:03,437 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-11-28 03:18:03,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:18:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-11-28 03:18:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:18:03,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:03,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:03,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:03,639 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:03,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1977222701, now seen corresponding path program 1 times [2020-11-28 03:18:03,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:03,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601206402] [2020-11-28 03:18:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:03,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601206402] [2020-11-28 03:18:03,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40398084] [2020-11-28 03:18:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:18:03,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:03,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:03,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-28 03:18:03,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275601507] [2020-11-28 03:18:03,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:18:03,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:03,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:18:03,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:18:03,767 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 7 states. [2020-11-28 03:18:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:03,913 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-11-28 03:18:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:18:03,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-28 03:18:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:03,914 INFO L225 Difference]: With dead ends: 43 [2020-11-28 03:18:03,914 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 03:18:03,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:18:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 03:18:03,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2020-11-28 03:18:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 03:18:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-11-28 03:18:03,920 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2020-11-28 03:18:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:03,920 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-11-28 03:18:03,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:18:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-11-28 03:18:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:18:03,929 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:03,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-11-28 03:18:04,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:04,142 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:04,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1070544478, now seen corresponding path program 2 times [2020-11-28 03:18:04,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:04,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672748413] [2020-11-28 03:18:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:04,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672748413] [2020-11-28 03:18:04,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623052748] [2020-11-28 03:18:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:04,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:04,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:04,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:18:04,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:04,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:04,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2020-11-28 03:18:04,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117627055] [2020-11-28 03:18:04,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:18:04,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:18:04,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:18:04,425 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 14 states. [2020-11-28 03:18:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:05,324 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2020-11-28 03:18:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-28 03:18:05,325 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-11-28 03:18:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:05,326 INFO L225 Difference]: With dead ends: 120 [2020-11-28 03:18:05,326 INFO L226 Difference]: Without dead ends: 104 [2020-11-28 03:18:05,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-11-28 03:18:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-28 03:18:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2020-11-28 03:18:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-28 03:18:05,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-11-28 03:18:05,360 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 20 [2020-11-28 03:18:05,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:05,361 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-11-28 03:18:05,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:18:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-11-28 03:18:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:18:05,369 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:05,369 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:05,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 03:18:05,591 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:05,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:05,591 INFO L82 PathProgramCache]: Analyzing trace with hash 451770350, now seen corresponding path program 1 times [2020-11-28 03:18:05,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:05,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334583445] [2020-11-28 03:18:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:05,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334583445] [2020-11-28 03:18:05,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765538958] [2020-11-28 03:18:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:18:05,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:05,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:05,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-28 03:18:05,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978105315] [2020-11-28 03:18:05,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:18:05,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:05,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:18:05,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:18:05,772 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 9 states. [2020-11-28 03:18:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:06,019 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-11-28 03:18:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:18:06,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-11-28 03:18:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:06,021 INFO L225 Difference]: With dead ends: 86 [2020-11-28 03:18:06,021 INFO L226 Difference]: Without dead ends: 85 [2020-11-28 03:18:06,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:18:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-28 03:18:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2020-11-28 03:18:06,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-28 03:18:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-11-28 03:18:06,037 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 20 [2020-11-28 03:18:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:06,038 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-11-28 03:18:06,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:18:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-11-28 03:18:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:18:06,039 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:06,039 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:06,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:06,266 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:06,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:06,267 INFO L82 PathProgramCache]: Analyzing trace with hash -147215097, now seen corresponding path program 1 times [2020-11-28 03:18:06,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:06,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480620385] [2020-11-28 03:18:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 03:18:06,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480620385] [2020-11-28 03:18:06,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:18:06,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:18:06,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792851903] [2020-11-28 03:18:06,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:18:06,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:06,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:18:06,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:18:06,319 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 5 states. [2020-11-28 03:18:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:06,403 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-11-28 03:18:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:18:06,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-11-28 03:18:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:06,405 INFO L225 Difference]: With dead ends: 72 [2020-11-28 03:18:06,405 INFO L226 Difference]: Without dead ends: 71 [2020-11-28 03:18:06,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:18:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-28 03:18:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-11-28 03:18:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-28 03:18:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-11-28 03:18:06,419 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 20 [2020-11-28 03:18:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:06,419 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-11-28 03:18:06,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:18:06,420 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-11-28 03:18:06,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:18:06,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:06,421 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:06,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 03:18:06,421 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:06,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:06,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1375092780, now seen corresponding path program 2 times [2020-11-28 03:18:06,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:06,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594946780] [2020-11-28 03:18:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:06,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594946780] [2020-11-28 03:18:06,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690800699] [2020-11-28 03:18:06,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:06,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:06,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:06,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:18:06,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:06,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:06,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-28 03:18:06,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861921746] [2020-11-28 03:18:06,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:18:06,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:06,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:18:06,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:18:06,620 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 9 states. [2020-11-28 03:18:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:06,892 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-11-28 03:18:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 03:18:06,893 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-11-28 03:18:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:06,894 INFO L225 Difference]: With dead ends: 88 [2020-11-28 03:18:06,894 INFO L226 Difference]: Without dead ends: 87 [2020-11-28 03:18:06,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:18:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-28 03:18:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2020-11-28 03:18:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-28 03:18:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-11-28 03:18:06,908 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 20 [2020-11-28 03:18:06,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:06,908 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-11-28 03:18:06,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:18:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-11-28 03:18:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:18:06,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:06,910 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-11-28 03:18:07,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-28 03:18:07,138 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:07,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:07,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1375099731, now seen corresponding path program 2 times [2020-11-28 03:18:07,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:07,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099347336] [2020-11-28 03:18:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:07,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099347336] [2020-11-28 03:18:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672861072] [2020-11-28 03:18:07,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:07,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:07,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:07,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:18:07,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:07,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:07,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-28 03:18:07,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696909449] [2020-11-28 03:18:07,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:18:07,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:07,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:18:07,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:18:07,315 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 9 states. [2020-11-28 03:18:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:07,520 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-11-28 03:18:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:18:07,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-11-28 03:18:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:07,523 INFO L225 Difference]: With dead ends: 90 [2020-11-28 03:18:07,523 INFO L226 Difference]: Without dead ends: 89 [2020-11-28 03:18:07,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:18:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-28 03:18:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2020-11-28 03:18:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-28 03:18:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-11-28 03:18:07,537 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 20 [2020-11-28 03:18:07,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:07,538 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-11-28 03:18:07,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:18:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-11-28 03:18:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:18:07,539 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:07,539 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:07,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 03:18:07,762 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:07,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:07,763 INFO L82 PathProgramCache]: Analyzing trace with hash -411380497, now seen corresponding path program 2 times [2020-11-28 03:18:07,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:07,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746032387] [2020-11-28 03:18:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:07,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746032387] [2020-11-28 03:18:07,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387372068] [2020-11-28 03:18:07,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:07,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:07,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:07,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:18:07,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:08,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:08,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2020-11-28 03:18:08,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696337888] [2020-11-28 03:18:08,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:18:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:08,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:18:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:18:08,064 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 13 states. [2020-11-28 03:18:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:08,432 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-11-28 03:18:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:18:08,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-11-28 03:18:08,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:08,434 INFO L225 Difference]: With dead ends: 87 [2020-11-28 03:18:08,434 INFO L226 Difference]: Without dead ends: 86 [2020-11-28 03:18:08,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:18:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-28 03:18:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2020-11-28 03:18:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-28 03:18:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2020-11-28 03:18:08,446 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 26 [2020-11-28 03:18:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:08,447 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2020-11-28 03:18:08,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:18:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2020-11-28 03:18:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:18:08,448 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:08,449 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:08,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-28 03:18:08,674 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:08,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash 511941933, now seen corresponding path program 2 times [2020-11-28 03:18:08,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:08,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125920351] [2020-11-28 03:18:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 03:18:08,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125920351] [2020-11-28 03:18:08,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123511970] [2020-11-28 03:18:08,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:08,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:18:08,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:18:08,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 03:18:08,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:08,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-28 03:18:08,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35078179] [2020-11-28 03:18:08,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:18:08,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:18:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:18:08,847 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 7 states. [2020-11-28 03:18:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:08,981 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2020-11-28 03:18:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:18:08,982 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-11-28 03:18:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:08,983 INFO L225 Difference]: With dead ends: 87 [2020-11-28 03:18:08,983 INFO L226 Difference]: Without dead ends: 86 [2020-11-28 03:18:08,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:18:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-28 03:18:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2020-11-28 03:18:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-28 03:18:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-11-28 03:18:08,995 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 26 [2020-11-28 03:18:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:08,996 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-11-28 03:18:08,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:18:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-11-28 03:18:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:18:08,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:08,998 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:09,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 03:18:09,222 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:09,223 INFO L82 PathProgramCache]: Analyzing trace with hash 511948884, now seen corresponding path program 3 times [2020-11-28 03:18:09,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:09,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939271645] [2020-11-28 03:18:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:09,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939271645] [2020-11-28 03:18:09,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670931404] [2020-11-28 03:18:09,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:09,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 03:18:09,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:09,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:18:09,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:09,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:09,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-28 03:18:09,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228465086] [2020-11-28 03:18:09,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:18:09,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:09,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:18:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:18:09,450 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 11 states. [2020-11-28 03:18:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:09,833 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2020-11-28 03:18:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-28 03:18:09,834 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-11-28 03:18:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:09,835 INFO L225 Difference]: With dead ends: 117 [2020-11-28 03:18:09,835 INFO L226 Difference]: Without dead ends: 116 [2020-11-28 03:18:09,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-28 03:18:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-28 03:18:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2020-11-28 03:18:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-28 03:18:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2020-11-28 03:18:09,855 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 26 [2020-11-28 03:18:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:09,856 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-11-28 03:18:09,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:18:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2020-11-28 03:18:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:18:09,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:18:09,858 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:18:10,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:10,078 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:18:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:18:10,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1109206892, now seen corresponding path program 4 times [2020-11-28 03:18:10,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:18:10,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698008254] [2020-11-28 03:18:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:18:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:18:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:18:10,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698008254] [2020-11-28 03:18:10,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399321675] [2020-11-28 03:18:10,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:10,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:18:10,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:18:10,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:18:10,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:18:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:18:10,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:18:10,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2020-11-28 03:18:10,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494834491] [2020-11-28 03:18:10,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-28 03:18:10,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:18:10,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-28 03:18:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:18:10,407 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 17 states. [2020-11-28 03:18:10,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:18:10,656 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-11-28 03:18:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:18:10,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-11-28 03:18:10,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:18:10,657 INFO L225 Difference]: With dead ends: 88 [2020-11-28 03:18:10,657 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:18:10,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-11-28 03:18:10,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:18:10,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:18:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:18:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:18:10,661 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-11-28 03:18:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:18:10,661 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:18:10,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-28 03:18:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:18:10,662 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:18:10,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:18:10,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:18:11,235 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-11-28 03:18:11,405 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-11-28 03:18:11,582 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-11-28 03:18:11,763 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-11-28 03:18:11,982 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-11-28 03:18:12,126 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-11-28 03:18:12,591 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 31 [2020-11-28 03:18:12,741 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 1 [2020-11-28 03:18:14,648 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 201 DAG size of output: 42 [2020-11-28 03:18:14,651 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-11-28 03:18:14,651 INFO L274 CegarLoopResult]: For program point fFINAL(lines 13 23) no Hoare annotation was computed. [2020-11-28 03:18:14,651 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-11-28 03:18:14,651 INFO L274 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-11-28 03:18:14,652 INFO L270 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse5 (+ |f_#in~y| 1))) (let ((.cse0 (not (<= |f_#in~y| 2147483647))) (.cse3 (not (<= |f_#in~x| .cse5))) (.cse4 (+ f_~y 1)) (.cse1 (not (<= |f_#in~x| 2147483647))) (.cse2 (not (<= 0 |f_#in~y|)))) (and (or (and (not (= f_~y 0)) (<= f_~x 2147483647) (<= 0 f_~y) (< 0 f_~x) (<= f_~y 2147483647)) .cse0 (not (<= 0 |f_#in~x|)) .cse1 .cse2) (or (not (<= |f_#in~y| |f_#in~x|)) (not (< 0 |f_#in~x|)) .cse0 .cse3 (and (<= f_~y f_~x) (<= f_~x .cse4)) .cse1) (or .cse0 .cse3 (<= .cse4 f_~x) (not (<= .cse5 |f_#in~x|)) .cse1 .cse2)))) [2020-11-28 03:18:14,652 INFO L274 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-11-28 03:18:14,652 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-11-28 03:18:14,652 INFO L274 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-11-28 03:18:14,653 INFO L270 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse0 (not (<= |f_#in~y| 2147483647))) (.cse1 (not (<= |f_#in~x| 2147483647))) (.cse2 (not (<= 0 |f_#in~y|)))) (and (or .cse0 (not (<= 0 |f_#in~x|)) .cse1 .cse2 (and (not (= f_~y 0)) (<= f_~x 2147483647) (<= 0 f_~y) (<= f_~y 2147483647) (<= 0 f_~x) (<= f_~x (+ f_~y 1)))) (or (not (< 0 |f_#in~x|)) .cse0 .cse1 .cse2))) [2020-11-28 03:18:14,653 INFO L274 CegarLoopResult]: For program point L18-3(line 18) no Hoare annotation was computed. [2020-11-28 03:18:14,653 INFO L274 CegarLoopResult]: For program point L14(lines 14 22) no Hoare annotation was computed. [2020-11-28 03:18:14,653 INFO L274 CegarLoopResult]: For program point fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 03:18:14,653 INFO L274 CegarLoopResult]: For program point fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-11-28 03:18:14,653 INFO L274 CegarLoopResult]: For program point fEXIT(lines 13 23) no Hoare annotation was computed. [2020-11-28 03:18:14,653 INFO L277 CegarLoopResult]: At program point fENTRY(lines 13 23) the Hoare annotation is: true [2020-11-28 03:18:14,653 INFO L274 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-11-28 03:18:14,654 INFO L274 CegarLoopResult]: For program point fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 03:18:14,654 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:18:14,654 INFO L270 CegarLoopResult]: At program point L31(lines 25 32) the Hoare annotation is: (<= ULTIMATE.start_main_~y~0 2147483647) [2020-11-28 03:18:14,654 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:18:14,654 INFO L270 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 ULTIMATE.start_main_~y~0) (<= 0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 2147483647)) [2020-11-28 03:18:14,654 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:18:14,654 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-11-28 03:18:14,654 INFO L274 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2020-11-28 03:18:14,654 INFO L274 CegarLoopResult]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2020-11-28 03:18:14,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:18:14 BoogieIcfgContainer [2020-11-28 03:18:14,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:18:14,673 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:18:14,673 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:18:14,673 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:18:14,674 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:58" (3/4) ... [2020-11-28 03:18:14,677 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:18:14,685 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2020-11-28 03:18:14,691 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-28 03:18:14,691 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 03:18:14,734 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7332596d-a63b-4f2d-a871-77da3708c108/bin/uautomizer/witness.graphml [2020-11-28 03:18:14,734 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:18:14,736 INFO L168 Benchmark]: Toolchain (without parser) took 16835.91 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 56.2 MB in the beginning and 73.8 MB in the end (delta: -17.7 MB). Peak memory consumption was 49.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:18:14,736 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 88.1 MB. Free memory was 63.7 MB in the beginning and 63.7 MB in the end (delta: 24.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:18:14,737 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.50 ms. Allocated memory is still 88.1 MB. Free memory was 56.0 MB in the beginning and 68.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:18:14,737 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.25 ms. Allocated memory is still 88.1 MB. Free memory was 68.0 MB in the beginning and 66.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:18:14,738 INFO L168 Benchmark]: Boogie Preprocessor took 41.60 ms. Allocated memory is still 88.1 MB. Free memory was 66.6 MB in the beginning and 65.8 MB in the end (delta: 812.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:18:14,739 INFO L168 Benchmark]: RCFGBuilder took 489.59 ms. Allocated memory is still 88.1 MB. Free memory was 65.8 MB in the beginning and 55.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:18:14,739 INFO L168 Benchmark]: TraceAbstraction took 15889.55 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 54.8 MB in the beginning and 75.9 MB in the end (delta: -21.1 MB). Peak memory consumption was 84.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:18:14,740 INFO L168 Benchmark]: Witness Printer took 62.00 ms. Allocated memory is still 157.3 MB. Free memory was 75.9 MB in the beginning and 73.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:18:14,747 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 88.1 MB. Free memory was 63.7 MB in the beginning and 63.7 MB in the end (delta: 24.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.50 ms. Allocated memory is still 88.1 MB. Free memory was 56.0 MB in the beginning and 68.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.25 ms. Allocated memory is still 88.1 MB. Free memory was 68.0 MB in the beginning and 66.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.60 ms. Allocated memory is still 88.1 MB. Free memory was 66.6 MB in the beginning and 65.8 MB in the end (delta: 812.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 489.59 ms. Allocated memory is still 88.1 MB. Free memory was 65.8 MB in the beginning and 55.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15889.55 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 54.8 MB in the beginning and 75.9 MB in the end (delta: -21.1 MB). Peak memory consumption was 84.2 MB. Max. memory is 16.1 GB. * Witness Printer took 62.00 ms. Allocated memory is still 157.3 MB. Free memory was 75.9 MB in the beginning and 73.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: y <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.9s, OverallIterations: 20, TraceHistogramMax: 4, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 289 SDtfs, 916 SDslu, 763 SDs, 0 SdLazy, 1509 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 510 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 284 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 47 PreInvPairs, 47 NumberOfFragments, 171 HoareAnnotationTreeSize, 47 FomulaSimplifications, 2746796 FormulaSimplificationTreeSizeReduction, 1.3s HoareSimplificationTime, 5 FomulaSimplificationsInter, 1604646 FormulaSimplificationTreeSizeReductionInter, 2.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 608 NumberOfCodeBlocks, 599 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 573 ConstructedInterpolants, 0 QuantifiedInterpolants, 36969 SizeOfPredicates, 42 NumberOfNonLiveVariables, 766 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 35 InterpolantComputations, 7 PerfectInterpolantSequences, 92/365 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...