./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/float_int_inv_square.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_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ........................................................................................................................................................................................................................................................................... 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_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ....................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:58:23,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:23,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:23,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:23,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:23,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:23,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:23,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:23,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:23,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:23,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:23,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:23,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:23,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:23,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:23,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:23,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:23,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:23,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:23,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:23,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:23,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:23,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:23,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:23,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:23,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:23,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:23,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:23,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:23,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:23,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:23,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:23,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:23,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:23,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:23,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:23,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:23,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:23,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:23,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:23,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:23,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:58:23,941 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:23,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:23,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:23,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:23,943 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:23,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:23,944 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:58:23,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:58:23,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:58:23,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:23,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:58:23,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:58:23,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:58:23,946 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:58:23,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:23,946 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:23,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:58:23,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:23,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:23,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:58:23,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:58:23,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:58:23,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:23,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:58:23,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:58:23,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:58:23,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:58:23,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:58:23,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:23,949 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_93f574ca-680f-4992-ad40-f82205bd0ef8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-11-28 02:58:24,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:24,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:24,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:24,264 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:24,270 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:24,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/../../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-11-28 02:58:24,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/data/906c63f6c/26e71043addc4efdb69a474ba0e8cc18/FLAG7c1d06053 [2020-11-28 02:58:24,877 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:24,877 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-11-28 02:58:24,886 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/data/906c63f6c/26e71043addc4efdb69a474ba0e8cc18/FLAG7c1d06053 [2020-11-28 02:58:25,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/data/906c63f6c/26e71043addc4efdb69a474ba0e8cc18 [2020-11-28 02:58:25,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:25,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:25,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:25,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:25,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:25,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d170ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25, skipping insertion in model container [2020-11-28 02:58:25,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:25,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:25,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:25,559 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:25,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:25,594 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:25,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25 WrapperNode [2020-11-28 02:58:25,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:25,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:25,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:25,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:25,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:25,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:25,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:25,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:25,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (1/1) ... [2020-11-28 02:58:25,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:25,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:25,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:25,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:25,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/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 02:58:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:58:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:58:25,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:25,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:26,102 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:26,102 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-28 02:58:26,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:26 BoogieIcfgContainer [2020-11-28 02:58:26,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:26,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:58:26,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:58:26,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:58:26,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:58:25" (1/3) ... [2020-11-28 02:58:26,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de7f1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:26, skipping insertion in model container [2020-11-28 02:58:26,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:25" (2/3) ... [2020-11-28 02:58:26,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de7f1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:26, skipping insertion in model container [2020-11-28 02:58:26,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:26" (3/3) ... [2020-11-28 02:58:26,116 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-11-28 02:58:26,129 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:58:26,133 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 02:58:26,146 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 02:58:26,171 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:58:26,171 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:58:26,171 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:58:26,172 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:26,172 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:26,172 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:58:26,172 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:26,172 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:58:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-28 02:58:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 02:58:26,190 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:26,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 02:58:26,192 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:26,198 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-11-28 02:58:26,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:26,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570909550] [2020-11-28 02:58:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:26,341 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 02:58:26,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570909550] [2020-11-28 02:58:26,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:26,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:58:26,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005160875] [2020-11-28 02:58:26,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:58:26,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:26,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:58:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:58:26,364 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-28 02:58:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:26,376 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-11-28 02:58:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:58:26,378 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-28 02:58:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:26,386 INFO L225 Difference]: With dead ends: 20 [2020-11-28 02:58:26,387 INFO L226 Difference]: Without dead ends: 7 [2020-11-28 02:58:26,389 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 [2020-11-28 02:58:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-28 02:58:26,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-28 02:58:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 02:58:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-28 02:58:26,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-28 02:58:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:26,420 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-28 02:58:26,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:58:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-28 02:58:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 02:58:26,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:26,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 02:58:26,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:58:26,421 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-11-28 02:58:26,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:26,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151943673] [2020-11-28 02:58:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:26,458 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:26,481 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:26,502 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:26,502 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:58:26,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:58:26,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:58:26 BoogieIcfgContainer [2020-11-28 02:58:26,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:58:26,525 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:26,525 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:26,526 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:26,526 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:26" (3/4) ... [2020-11-28 02:58:26,530 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 02:58:26,530 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:26,532 INFO L168 Benchmark]: Toolchain (without parser) took 1249.66 ms. Allocated memory is still 104.9 MB. Free memory was 70.1 MB in the beginning and 47.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:26,533 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 78.5 MB in the end (delta: 22.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:26,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.47 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 81.0 MB in the end (delta: -11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:26,535 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.18 ms. Allocated memory is still 104.9 MB. Free memory was 81.0 MB in the beginning and 79.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:26,536 INFO L168 Benchmark]: Boogie Preprocessor took 37.41 ms. Allocated memory is still 104.9 MB. Free memory was 79.4 MB in the beginning and 79.0 MB in the end (delta: 490.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:26,536 INFO L168 Benchmark]: RCFGBuilder took 427.82 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 68.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:26,537 INFO L168 Benchmark]: TraceAbstraction took 415.84 ms. Allocated memory is still 104.9 MB. Free memory was 67.8 MB in the beginning and 47.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:26,538 INFO L168 Benchmark]: Witness Printer took 5.13 ms. Allocated memory is still 104.9 MB. Free memory was 47.5 MB in the beginning and 47.0 MB in the end (delta: 490.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:26,542 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 78.5 MB in the end (delta: 22.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.47 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 81.0 MB in the end (delta: -11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.18 ms. Allocated memory is still 104.9 MB. Free memory was 81.0 MB in the beginning and 79.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.41 ms. Allocated memory is still 104.9 MB. Free memory was 79.4 MB in the beginning and 79.0 MB in the end (delta: 490.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 427.82 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 68.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 415.84 ms. Allocated memory is still 104.9 MB. Free memory was 67.8 MB in the beginning and 47.5 MB in the end (delta: 20.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.13 ms. Allocated memory is still 104.9 MB. Free memory was 47.5 MB in the beginning and 47.0 MB in the end (delta: 490.2 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 21. Possible FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L3] __assert_fail("0", "float_int_inv_square.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 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: 10 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=12occurred 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 [2020-11-28 02:58:29,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:29,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:29,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:29,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:29,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:29,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:29,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:29,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:29,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:29,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:29,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:29,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:29,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:29,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:29,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:29,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:29,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:29,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:29,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:29,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:29,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:29,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:29,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:29,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:29,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:29,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:29,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:29,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:29,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:29,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:29,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:29,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:29,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:29,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:29,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:29,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:29,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:29,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:29,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:29,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:29,233 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-28 02:58:29,281 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:29,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:29,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:29,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:29,285 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:29,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:29,286 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:58:29,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:58:29,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:29,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:58:29,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:58:29,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:58:29,288 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 02:58:29,288 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 02:58:29,288 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:58:29,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:29,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:29,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:58:29,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:29,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:29,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:58:29,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:58:29,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:58:29,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:29,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:58:29,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:58:29,290 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-28 02:58:29,290 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 02:58:29,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:58:29,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:29,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 02:58:29,291 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_93f574ca-680f-4992-ad40-f82205bd0ef8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-11-28 02:58:29,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:29,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:29,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:29,766 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:29,767 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:29,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/../../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-11-28 02:58:29,858 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/data/472bf4942/66ebe5db2f8945529984a775afde7e77/FLAGfb5248df0 [2020-11-28 02:58:30,369 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:30,370 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-11-28 02:58:30,378 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/data/472bf4942/66ebe5db2f8945529984a775afde7e77/FLAGfb5248df0 [2020-11-28 02:58:30,768 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/data/472bf4942/66ebe5db2f8945529984a775afde7e77 [2020-11-28 02:58:30,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:30,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:30,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:30,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:30,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:30,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:30" (1/1) ... [2020-11-28 02:58:30,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173ca188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:30, skipping insertion in model container [2020-11-28 02:58:30,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:30" (1/1) ... [2020-11-28 02:58:30,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:30,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:31,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:31,051 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:31,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:31,128 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:31,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31 WrapperNode [2020-11-28 02:58:31,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:31,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:31,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:31,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:31,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (1/1) ... [2020-11-28 02:58:31,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (1/1) ... [2020-11-28 02:58:31,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:31,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:31,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:31,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:31,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (1/1) ... [2020-11-28 02:58:31,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (1/1) ... [2020-11-28 02:58:31,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (1/1) ... [2020-11-28 02:58:31,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (1/1) ... [2020-11-28 02:58:31,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (1/1) ... [2020-11-28 02:58:31,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (1/1) ... [2020-11-28 02:58:31,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (1/1) ... [2020-11-28 02:58:31,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:31,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:31,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:31,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:31,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/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 02:58:31,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 02:58:31,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:58:31,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:31,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:32,617 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:32,618 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-28 02:58:32,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:32 BoogieIcfgContainer [2020-11-28 02:58:32,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:32,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:58:32,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:58:32,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:58:32,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:58:30" (1/3) ... [2020-11-28 02:58:32,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e151eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:32, skipping insertion in model container [2020-11-28 02:58:32,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:31" (2/3) ... [2020-11-28 02:58:32,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e151eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:32, skipping insertion in model container [2020-11-28 02:58:32,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:32" (3/3) ... [2020-11-28 02:58:32,649 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-11-28 02:58:32,661 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:58:32,668 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 02:58:32,693 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 02:58:32,752 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:58:32,752 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:58:32,752 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:58:32,752 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:32,753 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:32,753 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:58:32,753 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:32,753 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:58:32,766 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-28 02:58:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 02:58:32,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:32,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 02:58:32,774 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:32,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:32,791 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-11-28 02:58:32,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-28 02:58:32,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580078884] [2020-11-28 02:58:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/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 [2020-11-28 02:58:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:32,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-28 02:58:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:32,939 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 02:58:32,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 02:58:32,943 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 02:58:32,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580078884] [2020-11-28 02:58:32,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:32,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-28 02:58:32,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298000053] [2020-11-28 02:58:32,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:58:32,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-28 02:58:32,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:58:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:58:32,968 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-28 02:58:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:32,983 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-11-28 02:58:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:58:32,985 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-28 02:58:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:32,992 INFO L225 Difference]: With dead ends: 20 [2020-11-28 02:58:32,992 INFO L226 Difference]: Without dead ends: 7 [2020-11-28 02:58:32,995 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 [2020-11-28 02:58:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-28 02:58:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-28 02:58:33,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 02:58:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-28 02:58:33,024 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-28 02:58:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:33,025 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-28 02:58:33,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:58:33,025 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-28 02:58:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 02:58:33,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:33,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 02:58:33,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 02:58:33,228 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:33,229 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-11-28 02:58:33,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-28 02:58:33,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440197226] [2020-11-28 02:58:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/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 [2020-11-28 02:58:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:33,355 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:33,471 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:33,503 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-28 02:58:33,503 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:58:33,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 02:58:33,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:58:33 BoogieIcfgContainer [2020-11-28 02:58:33,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:58:33,730 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:33,731 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:33,732 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:33,732 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:32" (3/4) ... [2020-11-28 02:58:33,734 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:58:33,777 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_93f574ca-680f-4992-ad40-f82205bd0ef8/bin/uautomizer/witness.graphml [2020-11-28 02:58:33,777 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:33,779 INFO L168 Benchmark]: Toolchain (without parser) took 3003.47 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 34.0 MB in the beginning and 42.2 MB in the end (delta: -8.2 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:33,779 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 54.5 MB. Free memory is still 37.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:33,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.02 ms. Allocated memory is still 54.5 MB. Free memory was 33.7 MB in the beginning and 38.5 MB in the end (delta: -4.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:33,781 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.12 ms. Allocated memory is still 54.5 MB. Free memory was 38.5 MB in the beginning and 37.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:33,781 INFO L168 Benchmark]: Boogie Preprocessor took 26.20 ms. Allocated memory is still 54.5 MB. Free memory was 37.0 MB in the beginning and 36.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:33,782 INFO L168 Benchmark]: RCFGBuilder took 1396.19 ms. Allocated memory is still 54.5 MB. Free memory was 35.8 MB in the beginning and 25.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:33,783 INFO L168 Benchmark]: TraceAbstraction took 1097.27 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 24.6 MB in the beginning and 44.1 MB in the end (delta: -19.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:33,783 INFO L168 Benchmark]: Witness Printer took 46.41 ms. Allocated memory is still 67.1 MB. Free memory was 44.1 MB in the beginning and 42.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:33,790 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 54.5 MB. Free memory is still 37.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 364.02 ms. Allocated memory is still 54.5 MB. Free memory was 33.7 MB in the beginning and 38.5 MB in the end (delta: -4.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.12 ms. Allocated memory is still 54.5 MB. Free memory was 38.5 MB in the beginning and 37.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.20 ms. Allocated memory is still 54.5 MB. Free memory was 37.0 MB in the beginning and 36.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1396.19 ms. Allocated memory is still 54.5 MB. Free memory was 35.8 MB in the beginning and 25.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1097.27 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 24.6 MB in the beginning and 44.1 MB in the end (delta: -19.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 46.41 ms. Allocated memory is still 67.1 MB. Free memory was 44.1 MB in the beginning and 42.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L3] __assert_fail("0", "float_int_inv_square.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 31 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 incorrect! Received shutdown request...