./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_2x3-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_2x3-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77f2be4318d00da6c653f11357d37b225bf62c51 ................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 03:14:05,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:14:05,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:14:05,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:14:05,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:14:05,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:14:05,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:14:05,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:14:05,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:14:05,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:14:05,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:14:05,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:14:05,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:14:05,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:14:05,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:14:05,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:14:05,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:14:05,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:14:05,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:14:05,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:14:05,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:14:05,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:14:05,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:14:05,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:14:05,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:14:05,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:14:05,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:14:05,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:14:05,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:14:05,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:14:05,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:14:05,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:14:05,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:14:05,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:14:05,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:14:05,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:14:05,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:14:05,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:14:05,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:14:05,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:14:05,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:14:05,808 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:14:05,846 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:14:05,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:14:05,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:14:05,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:14:05,849 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:14:05,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:14:05,850 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:14:05,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:14:05,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:14:05,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:14:05,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:14:05,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:14:05,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:14:05,852 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:14:05,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:14:05,853 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:14:05,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:14:05,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:14:05,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:14:05,854 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:14:05,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:14:05,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:14:05,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:14:05,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:14:05,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:14:05,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:14:05,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:14:05,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:14:05,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:14:05,857 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_2621db07-3a51-463d-9fc2-aa4023afcecc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77f2be4318d00da6c653f11357d37b225bf62c51 [2020-11-28 03:14:06,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:14:06,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:14:06,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:14:06,198 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:14:06,199 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:14:06,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_2x3-2.c [2020-11-28 03:14:06,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/data/28e04a5c3/72b07e92702249d89656616a6c494cba/FLAGcf1e0a8e3 [2020-11-28 03:14:06,801 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:14:06,802 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/sv-benchmarks/c/recursive-simple/sum_2x3-2.c [2020-11-28 03:14:06,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/data/28e04a5c3/72b07e92702249d89656616a6c494cba/FLAGcf1e0a8e3 [2020-11-28 03:14:07,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/data/28e04a5c3/72b07e92702249d89656616a6c494cba [2020-11-28 03:14:07,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:14:07,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:14:07,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:14:07,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:14:07,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:14:07,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508d5068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07, skipping insertion in model container [2020-11-28 03:14:07,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:14:07,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:14:07,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:14:07,363 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:14:07,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:14:07,408 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:14:07,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07 WrapperNode [2020-11-28 03:14:07,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:14:07,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:14:07,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:14:07,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:14:07,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:14:07,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:14:07,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:14:07,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:14:07,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... [2020-11-28 03:14:07,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:14:07,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:14:07,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:14:07,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:14:07,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/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 03:14:07,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:14:07,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:14:07,559 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-11-28 03:14:07,560 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-11-28 03:14:07,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:14:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:14:07,817 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:14:07,817 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:14:07,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:07 BoogieIcfgContainer [2020-11-28 03:14:07,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:14:07,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:14:07,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:14:07,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:14:07,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:14:07" (1/3) ... [2020-11-28 03:14:07,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640b5281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:14:07, skipping insertion in model container [2020-11-28 03:14:07,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:07" (2/3) ... [2020-11-28 03:14:07,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@640b5281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:14:07, skipping insertion in model container [2020-11-28 03:14:07,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:07" (3/3) ... [2020-11-28 03:14:07,827 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2020-11-28 03:14:07,838 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:14:07,842 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:14:07,853 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:14:07,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:14:07,887 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:14:07,888 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:14:07,888 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:14:07,888 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:14:07,888 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:14:07,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:14:07,888 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:14:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-28 03:14:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:14:07,940 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:07,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:07,941 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-11-28 03:14:07,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:07,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519077573] [2020-11-28 03:14:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:08,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:08,280 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 03:14:08,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519077573] [2020-11-28 03:14:08,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:08,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:14:08,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293288264] [2020-11-28 03:14:08,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:14:08,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:14:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:08,303 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-11-28 03:14:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:08,409 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-28 03:14:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:14:08,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 03:14:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:08,428 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:14:08,430 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 03:14:08,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:14:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 03:14:08,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 03:14:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 03:14:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-28 03:14:08,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-28 03:14:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:08,468 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-28 03:14:08,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:14:08,469 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-28 03:14:08,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:14:08,470 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:08,470 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:08,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:14:08,471 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:08,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-11-28 03:14:08,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:08,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995062522] [2020-11-28 03:14:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:08,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:08,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:14:08,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995062522] [2020-11-28 03:14:08,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29996256] [2020-11-28 03:14:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/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 03:14:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:14:08,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:14:08,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:14:08,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-28 03:14:08,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931463781] [2020-11-28 03:14:08,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:14:08,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:08,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:14:08,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:14:08,844 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-11-28 03:14:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:08,922 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-28 03:14:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:14:08,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-28 03:14:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:08,924 INFO L225 Difference]: With dead ends: 22 [2020-11-28 03:14:08,924 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 03:14:08,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:14:08,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 03:14:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 03:14:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 03:14:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-28 03:14:08,930 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-28 03:14:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:08,930 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-28 03:14:08,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:14:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-28 03:14:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:14:08,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:08,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:09,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 03:14:09,152 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:09,152 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-11-28 03:14:09,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:09,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163757362] [2020-11-28 03:14:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:09,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:09,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:09,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 03:14:09,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163757362] [2020-11-28 03:14:09,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653491612] [2020-11-28 03:14:09,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/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 03:14:09,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:14:09,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:14:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-28 03:14:09,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 03:14:09,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:14:09,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-28 03:14:09,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615017991] [2020-11-28 03:14:09,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:14:09,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:09,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:14:09,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:14:09,775 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 14 states. [2020-11-28 03:14:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:10,026 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-28 03:14:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:14:10,027 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-11-28 03:14:10,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:10,028 INFO L225 Difference]: With dead ends: 25 [2020-11-28 03:14:10,029 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 03:14:10,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-11-28 03:14:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 03:14:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-28 03:14:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 03:14:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-28 03:14:10,034 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-11-28 03:14:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:10,035 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-28 03:14:10,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:14:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-28 03:14:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:14:10,040 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:10,041 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:10,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:10,242 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:10,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-11-28 03:14:10,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:10,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708926722] [2020-11-28 03:14:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:10,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:10,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:10,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:10,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 03:14:10,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708926722] [2020-11-28 03:14:10,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281872439] [2020-11-28 03:14:10,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/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 03:14:10,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 03:14:10,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:14:10,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:14:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 03:14:10,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:14:10,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-28 03:14:10,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949259630] [2020-11-28 03:14:10,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:14:10,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:14:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:14:10,570 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-11-28 03:14:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:10,667 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-11-28 03:14:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:14:10,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-11-28 03:14:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:10,668 INFO L225 Difference]: With dead ends: 31 [2020-11-28 03:14:10,668 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:14:10,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:14:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:14:10,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:14:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:14:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:14:10,670 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-11-28 03:14:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:10,670 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:14:10,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:14:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:14:10,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:14:10,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:10,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:14:10,942 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:14:10,942 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:14:10,942 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:14:10,942 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:14:10,942 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 03:14:10,942 INFO L274 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-11-28 03:14:10,942 INFO L274 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-11-28 03:14:10,943 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 2) [2020-11-28 03:14:10,943 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-11-28 03:14:10,943 INFO L274 CegarLoopResult]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-11-28 03:14:10,943 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-28 03:14:10,943 INFO L274 CegarLoopResult]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-11-28 03:14:10,943 INFO L270 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= 1 |sum_#in~n|)) [2020-11-28 03:14:10,943 INFO L274 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-11-28 03:14:10,943 INFO L274 CegarLoopResult]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-11-28 03:14:10,944 INFO L274 CegarLoopResult]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-11-28 03:14:10,944 INFO L277 CegarLoopResult]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-11-28 03:14:10,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:14:10 BoogieIcfgContainer [2020-11-28 03:14:10,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:14:10,960 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:14:10,961 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:14:10,961 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:14:10,961 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:07" (3/4) ... [2020-11-28 03:14:10,964 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:14:10,971 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2020-11-28 03:14:10,976 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 03:14:10,977 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-28 03:14:10,977 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:14:10,977 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:14:11,012 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2621db07-3a51-463d-9fc2-aa4023afcecc/bin/uautomizer/witness.graphml [2020-11-28 03:14:11,012 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:14:11,014 INFO L168 Benchmark]: Toolchain (without parser) took 3842.52 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 73.2 MB in the beginning and 79.1 MB in the end (delta: -5.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:11,014 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 67.1 MB. Free memory was 29.9 MB in the beginning and 29.8 MB in the end (delta: 33.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:14:11,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.88 ms. Allocated memory is still 104.9 MB. Free memory was 73.0 MB in the beginning and 82.8 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:11,015 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.49 ms. Allocated memory is still 104.9 MB. Free memory was 82.8 MB in the beginning and 81.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:14:11,016 INFO L168 Benchmark]: Boogie Preprocessor took 18.23 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 80.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:11,016 INFO L168 Benchmark]: RCFGBuilder took 357.73 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 69.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:11,017 INFO L168 Benchmark]: TraceAbstraction took 3139.50 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 69.1 MB in the beginning and 81.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:11,018 INFO L168 Benchmark]: Witness Printer took 52.42 ms. Allocated memory is still 125.8 MB. Free memory was 81.2 MB in the beginning and 79.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:11,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 67.1 MB. Free memory was 29.9 MB in the beginning and 29.8 MB in the end (delta: 33.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 236.88 ms. Allocated memory is still 104.9 MB. Free memory was 73.0 MB in the beginning and 82.8 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.49 ms. Allocated memory is still 104.9 MB. Free memory was 82.8 MB in the beginning and 81.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.23 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 80.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 357.73 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 69.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3139.50 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 69.1 MB in the beginning and 81.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * Witness Printer took 52.42 ms. Allocated memory is still 125.8 MB. Free memory was 81.2 MB in the beginning and 79.1 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: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.9s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 45 SDslu, 117 SDs, 0 SdLazy, 197 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 14 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 10335 SizeOfPredicates, 15 NumberOfNonLiveVariables, 279 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 68/96 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...