./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_square-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_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/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 052b65435ce93a43ae641d125fc7546191d1b08e ........................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/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 052b65435ce93a43ae641d125fc7546191d1b08e .................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:15:00,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:15:00,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:15:00,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:15:00,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:15:00,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:15:00,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:15:00,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:15:00,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:15:00,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:15:00,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:15:00,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:15:00,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:15:00,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:15:00,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:15:00,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:15:00,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:15:00,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:15:00,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:15:00,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:15:00,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:15:00,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:15:00,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:15:00,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:15:00,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:15:00,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:15:00,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:15:00,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:15:00,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:15:00,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:15:00,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:15:00,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:15:00,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:15:00,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:15:00,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:15:00,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:15:00,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:15:00,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:15:00,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:15:00,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:15:00,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:15:00,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:15:00,531 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:15:00,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:15:00,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:15:00,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:15:00,533 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:15:00,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:15:00,533 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:15:00,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:15:00,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:15:00,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:15:00,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:15:00,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:15:00,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:15:00,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:15:00,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:15:00,535 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:15:00,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:15:00,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:15:00,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:15:00,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:15:00,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:15:00,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:15:00,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:15:00,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:15:00,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:15:00,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:15:00,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:15:00,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:15:00,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:15:00,539 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_b7e09514-fd48-4d30-a77c-7a7c19a462d3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2020-11-29 21:15:00,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:15:00,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:15:00,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:15:00,800 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:15:00,801 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:15:00,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/../../sv-benchmarks/c/float-benchs/inv_square-2.c [2020-11-29 21:15:00,883 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/data/20be84630/7053134a19ff4ae498269adf0ed79beb/FLAG78cfa488b [2020-11-29 21:15:01,370 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:15:01,370 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/sv-benchmarks/c/float-benchs/inv_square-2.c [2020-11-29 21:15:01,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/data/20be84630/7053134a19ff4ae498269adf0ed79beb/FLAG78cfa488b [2020-11-29 21:15:01,752 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/data/20be84630/7053134a19ff4ae498269adf0ed79beb [2020-11-29 21:15:01,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:15:01,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:15:01,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:15:01,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:15:01,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:15:01,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:01,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b925173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01, skipping insertion in model container [2020-11-29 21:15:01,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:01,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:15:01,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:15:01,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:15:01,953 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:15:01,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:15:01,984 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:15:01,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01 WrapperNode [2020-11-29 21:15:01,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:15:01,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:15:01,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:15:01,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:15:01,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:02,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:02,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:15:02,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:15:02,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:15:02,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:15:02,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:02,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:02,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:02,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:02,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:02,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:02,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (1/1) ... [2020-11-29 21:15:02,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:15:02,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:15:02,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:15:02,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:15:02,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:15:02,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:15:02,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:15:02,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:15:02,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:15:02,316 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:15:02,317 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 21:15:02,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:15:02 BoogieIcfgContainer [2020-11-29 21:15:02,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:15:02,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:15:02,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:15:02,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:15:02,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:15:01" (1/3) ... [2020-11-29 21:15:02,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218fa2c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:15:02, skipping insertion in model container [2020-11-29 21:15:02,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:01" (2/3) ... [2020-11-29 21:15:02,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@218fa2c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:15:02, skipping insertion in model container [2020-11-29 21:15:02,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:15:02" (3/3) ... [2020-11-29 21:15:02,350 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2020-11-29 21:15:02,376 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:15:02,380 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:15:02,392 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:15:02,444 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:15:02,444 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:15:02,445 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:15:02,445 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:15:02,445 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:15:02,445 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:15:02,445 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:15:02,445 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:15:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-29 21:15:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 21:15:02,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:15:02,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 21:15:02,486 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:15:02,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:15:02,491 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-11-29 21:15:02,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:15:02,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372081801] [2020-11-29 21:15:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:15:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:15:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:15:02,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372081801] [2020-11-29 21:15:02,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:15:02,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 21:15:02,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768360949] [2020-11-29 21:15:02,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 21:15:02,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:15:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 21:15:02,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:15:02,642 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-29 21:15:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:15:02,657 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-29 21:15:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 21:15:02,658 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 21:15:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:15:02,664 INFO L225 Difference]: With dead ends: 22 [2020-11-29 21:15:02,664 INFO L226 Difference]: Without dead ends: 7 [2020-11-29 21:15:02,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:15:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-29 21:15:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-29 21:15:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 21:15:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-29 21:15:02,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-29 21:15:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:15:02,696 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-29 21:15:02,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 21:15:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-29 21:15:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 21:15:02,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:15:02,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 21:15:02,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:15:02,698 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:15:02,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:15:02,699 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-11-29 21:15:02,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:15:02,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745986897] [2020-11-29 21:15:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:15:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:15:02,732 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:15:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:15:02,751 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:15:02,771 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:15:02,771 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 21:15:02,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 21:15:02,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:15:02 BoogieIcfgContainer [2020-11-29 21:15:02,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:15:02,791 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:15:02,791 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:15:02,792 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:15:02,792 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:15:02" (3/4) ... [2020-11-29 21:15:02,795 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 21:15:02,796 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:15:02,798 INFO L168 Benchmark]: Toolchain (without parser) took 1040.61 ms. Allocated memory is still 90.2 MB. Free memory was 62.4 MB in the beginning and 49.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2020-11-29 21:15:02,798 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 73.4 MB. Free memory was 40.7 MB in the beginning and 40.7 MB in the end (delta: 39.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:15:02,799 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.10 ms. Allocated memory is still 90.2 MB. Free memory was 62.2 MB in the beginning and 52.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:15:02,800 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.29 ms. Allocated memory is still 90.2 MB. Free memory was 52.8 MB in the beginning and 51.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:15:02,801 INFO L168 Benchmark]: Boogie Preprocessor took 19.04 ms. Allocated memory is still 90.2 MB. Free memory was 51.4 MB in the beginning and 50.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:15:02,802 INFO L168 Benchmark]: RCFGBuilder took 278.64 ms. Allocated memory is still 90.2 MB. Free memory was 50.3 MB in the beginning and 39.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:15:02,803 INFO L168 Benchmark]: TraceAbstraction took 471.38 ms. Allocated memory is still 90.2 MB. Free memory was 39.0 MB in the beginning and 50.2 MB in the end (delta: -11.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:15:02,803 INFO L168 Benchmark]: Witness Printer took 4.36 ms. Allocated memory is still 90.2 MB. Free memory was 50.2 MB in the beginning and 49.9 MB in the end (delta: 270.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:15:02,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 73.4 MB. Free memory was 40.7 MB in the beginning and 40.7 MB in the end (delta: 39.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 227.10 ms. Allocated memory is still 90.2 MB. Free memory was 62.2 MB in the beginning and 52.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.29 ms. Allocated memory is still 90.2 MB. Free memory was 52.8 MB in the beginning and 51.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.04 ms. Allocated memory is still 90.2 MB. Free memory was 51.4 MB in the beginning and 50.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 278.64 ms. Allocated memory is still 90.2 MB. Free memory was 50.3 MB in the beginning and 39.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 471.38 ms. Allocated memory is still 90.2 MB. Free memory was 39.0 MB in the beginning and 50.2 MB in the end (delta: -11.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.36 ms. Allocated memory is still 90.2 MB. Free memory was 50.2 MB in the beginning and 49.9 MB in the end (delta: 270.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x <= -1e-20f || x >= 1e-20f [L23] y = x * x [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_square-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:15:05,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:15:05,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:15:05,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:15:05,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:15:05,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:15:05,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:15:05,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:15:05,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:15:05,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:15:05,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:15:05,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:15:05,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:15:05,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:15:05,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:15:05,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:15:05,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:15:05,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:15:05,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:15:05,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:15:05,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:15:05,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:15:05,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:15:05,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:15:05,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:15:05,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:15:05,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:15:05,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:15:05,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:15:05,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:15:05,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:15:05,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:15:05,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:15:05,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:15:05,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:15:05,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:15:05,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:15:05,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:15:05,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:15:05,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:15:05,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:15:05,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 21:15:05,495 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:15:05,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:15:05,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:15:05,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:15:05,499 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:15:05,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:15:05,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:15:05,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:15:05,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:15:05,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:15:05,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:15:05,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:15:05,502 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 21:15:05,502 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 21:15:05,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:15:05,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:15:05,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:15:05,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:15:05,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:15:05,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:15:05,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:15:05,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:15:05,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:15:05,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:15:05,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:15:05,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:15:05,505 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 21:15:05,505 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 21:15:05,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:15:05,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:15:05,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 21:15:05,506 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_b7e09514-fd48-4d30-a77c-7a7c19a462d3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2020-11-29 21:15:05,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:15:05,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:15:05,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:15:05,985 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:15:05,986 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:15:05,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/../../sv-benchmarks/c/float-benchs/inv_square-2.c [2020-11-29 21:15:06,072 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/data/e84038b23/e6c5f2d0eaeb4671a100a05859a190c0/FLAG1546aa90f [2020-11-29 21:15:06,639 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:15:06,639 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/sv-benchmarks/c/float-benchs/inv_square-2.c [2020-11-29 21:15:06,647 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/data/e84038b23/e6c5f2d0eaeb4671a100a05859a190c0/FLAG1546aa90f [2020-11-29 21:15:07,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/data/e84038b23/e6c5f2d0eaeb4671a100a05859a190c0 [2020-11-29 21:15:07,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:15:07,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:15:07,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:15:07,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:15:07,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:15:07,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d2a129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07, skipping insertion in model container [2020-11-29 21:15:07,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:15:07,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:15:07,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:15:07,237 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:15:07,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:15:07,272 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:15:07,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07 WrapperNode [2020-11-29 21:15:07,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:15:07,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:15:07,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:15:07,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:15:07,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,310 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:15:07,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:15:07,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:15:07,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:15:07,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (1/1) ... [2020-11-29 21:15:07,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:15:07,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:15:07,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:15:07,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:15:07,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:15:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 21:15:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:15:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:15:07,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:15:09,206 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:15:09,213 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 21:15:09,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:15:09 BoogieIcfgContainer [2020-11-29 21:15:09,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:15:09,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:15:09,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:15:09,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:15:09,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:15:07" (1/3) ... [2020-11-29 21:15:09,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b31154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:15:09, skipping insertion in model container [2020-11-29 21:15:09,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:15:07" (2/3) ... [2020-11-29 21:15:09,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b31154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:15:09, skipping insertion in model container [2020-11-29 21:15:09,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:15:09" (3/3) ... [2020-11-29 21:15:09,245 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2020-11-29 21:15:09,256 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:15:09,266 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:15:09,278 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:15:09,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:15:09,319 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:15:09,319 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:15:09,320 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:15:09,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:15:09,320 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:15:09,320 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:15:09,320 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:15:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-29 21:15:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 21:15:09,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:15:09,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 21:15:09,346 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:15:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:15:09,354 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-11-29 21:15:09,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:15:09,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035892506] [2020-11-29 21:15:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-29 21:15:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:15:09,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 21:15:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:15:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:15:09,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:15:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:15:09,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035892506] [2020-11-29 21:15:09,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:15:09,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 21:15:09,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550068939] [2020-11-29 21:15:09,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 21:15:09,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:15:09,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 21:15:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:15:09,546 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-29 21:15:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:15:09,559 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-29 21:15:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 21:15:09,561 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-29 21:15:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:15:09,569 INFO L225 Difference]: With dead ends: 22 [2020-11-29 21:15:09,569 INFO L226 Difference]: Without dead ends: 7 [2020-11-29 21:15:09,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:15:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-29 21:15:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-29 21:15:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 21:15:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-29 21:15:09,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-29 21:15:09,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:15:09,601 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-29 21:15:09,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 21:15:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-29 21:15:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 21:15:09,602 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:15:09,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 21:15:09,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 21:15:09,818 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:15:09,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:15:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-11-29 21:15:09,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 21:15:09,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975561399] [2020-11-29 21:15:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-29 21:15:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:15:09,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 21:15:10,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:15:10,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:15:10,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 21:15:10,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 21:15:11,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 21:15:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:15:12,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 21:15:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:15:13,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975561399] [2020-11-29 21:15:13,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:15:13,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [] total 7 [2020-11-29 21:15:13,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253972235] [2020-11-29 21:15:13,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 21:15:13,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 21:15:13,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:15:13,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:15:13,902 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 7 states. [2020-11-29 21:15:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:15:14,242 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-11-29 21:15:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 21:15:14,242 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2020-11-29 21:15:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:15:14,242 INFO L225 Difference]: With dead ends: 7 [2020-11-29 21:15:14,243 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 21:15:14,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:15:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 21:15:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 21:15:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 21:15:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 21:15:14,244 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-11-29 21:15:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:15:14,244 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:15:14,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 21:15:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 21:15:14,245 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 21:15:14,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 21:15:14,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 21:15:14,495 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 21:15:14,495 INFO L277 CegarLoopResult]: At program point L27(lines 15 28) the Hoare annotation is: true [2020-11-29 21:15:14,496 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-11-29 21:15:14,496 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-11-29 21:15:14,496 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-29 21:15:14,496 INFO L277 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2020-11-29 21:15:14,496 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-11-29 21:15:14,496 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 21:15:14,496 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 21:15:14,496 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 21:15:14,497 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-29 21:15:14,497 INFO L274 CegarLoopResult]: For program point L22-1(lines 22 26) no Hoare annotation was computed. [2020-11-29 21:15:14,497 INFO L274 CegarLoopResult]: For program point L10(lines 22 26) no Hoare annotation was computed. [2020-11-29 21:15:14,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:15:14 BoogieIcfgContainer [2020-11-29 21:15:14,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:15:14,510 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:15:14,514 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:15:14,515 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:15:14,518 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:15:09" (3/4) ... [2020-11-29 21:15:14,521 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 21:15:14,531 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 21:15:14,531 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 21:15:14,533 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-29 21:15:14,533 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:15:14,592 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b7e09514-fd48-4d30-a77c-7a7c19a462d3/bin/uautomizer/witness.graphml [2020-11-29 21:15:14,594 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:15:14,596 INFO L168 Benchmark]: Toolchain (without parser) took 7558.22 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 32.6 MB in the beginning and 50.5 MB in the end (delta: -17.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:15:14,598 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 54.5 MB. Free memory was 37.4 MB in the beginning and 37.3 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:15:14,599 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.29 ms. Allocated memory is still 54.5 MB. Free memory was 32.4 MB in the beginning and 36.2 MB in the end (delta: -3.8 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2020-11-29 21:15:14,599 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.16 ms. Allocated memory is still 54.5 MB. Free memory was 36.2 MB in the beginning and 34.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:15:14,601 INFO L168 Benchmark]: Boogie Preprocessor took 81.91 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 34.7 MB in the beginning and 55.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:15:14,601 INFO L168 Benchmark]: RCFGBuilder took 1821.33 ms. Allocated memory is still 71.3 MB. Free memory was 55.0 MB in the beginning and 43.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:15:14,602 INFO L168 Benchmark]: TraceAbstraction took 5291.91 ms. Allocated memory is still 71.3 MB. Free memory was 43.4 MB in the beginning and 52.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:15:14,603 INFO L168 Benchmark]: Witness Printer took 84.93 ms. Allocated memory is still 71.3 MB. Free memory was 52.6 MB in the beginning and 50.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:15:14,609 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 54.5 MB. Free memory was 37.4 MB in the beginning and 37.3 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 231.29 ms. Allocated memory is still 54.5 MB. Free memory was 32.4 MB in the beginning and 36.2 MB in the end (delta: -3.8 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.16 ms. Allocated memory is still 54.5 MB. Free memory was 36.2 MB in the beginning and 34.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 81.91 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 34.7 MB in the beginning and 55.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1821.33 ms. Allocated memory is still 71.3 MB. Free memory was 55.0 MB in the beginning and 43.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5291.91 ms. Allocated memory is still 71.3 MB. Free memory was 43.4 MB in the beginning and 52.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. * Witness Printer took 84.93 ms. Allocated memory is still 71.3 MB. Free memory was 52.6 MB in the beginning and 50.5 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 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 6 SDslu, 2 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 SizeOfPredicates, 7 NumberOfNonLiveVariables, 64 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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...