./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=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 [2020-10-24 22:13:40,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 22:13:40,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 22:13:40,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 22:13:40,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 22:13:40,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 22:13:40,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 22:13:40,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 22:13:40,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 22:13:40,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 22:13:40,958 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 22:13:40,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 22:13:40,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 22:13:40,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 22:13:40,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 22:13:40,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 22:13:40,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 22:13:40,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 22:13:40,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 22:13:40,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 22:13:40,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 22:13:40,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 22:13:40,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 22:13:40,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 22:13:40,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 22:13:40,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 22:13:40,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 22:13:40,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 22:13:40,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 22:13:40,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 22:13:40,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 22:13:40,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 22:13:40,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 22:13:40,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 22:13:40,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 22:13:40,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 22:13:40,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 22:13:40,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 22:13:40,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 22:13:40,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 22:13:40,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 22:13:41,000 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 22:13:41,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 22:13:41,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 22:13:41,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 22:13:41,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 22:13:41,036 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 22:13:41,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 22:13:41,037 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 22:13:41,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 22:13:41,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 22:13:41,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 22:13:41,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 22:13:41,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 22:13:41,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 22:13:41,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 22:13:41,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 22:13:41,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 22:13:41,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 22:13:41,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 22:13:41,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 22:13:41,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 22:13:41,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 22:13:41,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 22:13:41,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 22:13:41,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 22:13:41,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 22:13:41,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 22:13:41,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 22:13:41,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 22:13:41,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 22:13:41,044 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-10-24 22:13:41,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 22:13:41,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 22:13:41,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 22:13:41,474 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 22:13:41,476 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 22:13:41,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-24 22:13:41,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e161d8efd/5b2634d2de87489b94e97c32a6bf46f1/FLAGde3943831 [2020-10-24 22:13:42,224 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 22:13:42,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-24 22:13:42,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e161d8efd/5b2634d2de87489b94e97c32a6bf46f1/FLAGde3943831 [2020-10-24 22:13:42,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e161d8efd/5b2634d2de87489b94e97c32a6bf46f1 [2020-10-24 22:13:42,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 22:13:42,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 22:13:42,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 22:13:42,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 22:13:42,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 22:13:42,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:42,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d710937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42, skipping insertion in model container [2020-10-24 22:13:42,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:42,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 22:13:42,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 22:13:42,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 22:13:42,919 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 22:13:42,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 22:13:42,953 INFO L208 MainTranslator]: Completed translation [2020-10-24 22:13:42,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42 WrapperNode [2020-10-24 22:13:42,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 22:13:42,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 22:13:42,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 22:13:42,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 22:13:42,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:42,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:42,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 22:13:42,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 22:13:42,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 22:13:42,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 22:13:43,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:43,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:43,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:43,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:43,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:43,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:43,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (1/1) ... [2020-10-24 22:13:43,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 22:13:43,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 22:13:43,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 22:13:43,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 22:13:43,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-24 22:13:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 22:13:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 22:13:43,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 22:13:43,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 22:13:43,295 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 22:13:43,295 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-24 22:13:43,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:13:43 BoogieIcfgContainer [2020-10-24 22:13:43,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 22:13:43,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 22:13:43,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 22:13:43,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 22:13:43,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:13:42" (1/3) ... [2020-10-24 22:13:43,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512cc95c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:13:43, skipping insertion in model container [2020-10-24 22:13:43,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:42" (2/3) ... [2020-10-24 22:13:43,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512cc95c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:13:43, skipping insertion in model container [2020-10-24 22:13:43,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:13:43" (3/3) ... [2020-10-24 22:13:43,308 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-10-24 22:13:43,321 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 22:13:43,326 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 22:13:43,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 22:13:43,370 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 22:13:43,370 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 22:13:43,370 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 22:13:43,370 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 22:13:43,370 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 22:13:43,371 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 22:13:43,371 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 22:13:43,371 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 22:13:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-24 22:13:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 22:13:43,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 22:13:43,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 22:13:43,397 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 22:13:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 22:13:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-24 22:13:43,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 22:13:43,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860016333] [2020-10-24 22:13:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 22:13:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 22:13:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 22:13:43,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860016333] [2020-10-24 22:13:43,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 22:13:43,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 22:13:43,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811318470] [2020-10-24 22:13:43,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 22:13:43,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 22:13:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 22:13:43,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 22:13:43,678 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-24 22:13:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 22:13:43,697 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-24 22:13:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 22:13:43,698 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 22:13:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 22:13:43,707 INFO L225 Difference]: With dead ends: 20 [2020-10-24 22:13:43,708 INFO L226 Difference]: Without dead ends: 7 [2020-10-24 22:13:43,711 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 [2020-10-24 22:13:43,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-24 22:13:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-24 22:13:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-24 22:13:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-24 22:13:43,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-24 22:13:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 22:13:43,747 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-24 22:13:43,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 22:13:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-24 22:13:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 22:13:43,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 22:13:43,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 22:13:43,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 22:13:43,748 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 22:13:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 22:13:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-24 22:13:43,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 22:13:43,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952403213] [2020-10-24 22:13:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 22:13:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 22:13:43,792 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 22:13:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 22:13:43,842 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 22:13:43,876 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 22:13:43,877 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 22:13:43,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 22:13:43,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:13:43 BoogieIcfgContainer [2020-10-24 22:13:43,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 22:13:43,918 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 22:13:43,918 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 22:13:43,919 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 22:13:43,920 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:13:43" (3/4) ... [2020-10-24 22:13:43,923 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 22:13:43,924 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 22:13:43,929 INFO L168 Benchmark]: Toolchain (without parser) took 1309.06 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 18.5 MB in the beginning and 22.6 MB in the end (delta: -4.0 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-10-24 22:13:43,930 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 41.9 MB. Free memory was 28.3 MB in the beginning and 28.3 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 22:13:43,933 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.14 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 17.9 MB in the beginning and 28.3 MB in the end (delta: -10.4 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-24 22:13:43,934 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.66 ms. Allocated memory is still 50.3 MB. Free memory was 28.3 MB in the beginning and 26.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 22:13:43,935 INFO L168 Benchmark]: Boogie Preprocessor took 22.02 ms. Allocated memory is still 50.3 MB. Free memory was 26.8 MB in the beginning and 25.9 MB in the end (delta: 903.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 22:13:43,936 INFO L168 Benchmark]: RCFGBuilder took 280.58 ms. Allocated memory is still 50.3 MB. Free memory was 25.9 MB in the beginning and 29.1 MB in the end (delta: -3.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-10-24 22:13:43,938 INFO L168 Benchmark]: TraceAbstraction took 617.86 ms. Allocated memory is still 50.3 MB. Free memory was 28.7 MB in the beginning and 22.8 MB in the end (delta: 5.9 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-10-24 22:13:43,939 INFO L168 Benchmark]: Witness Printer took 5.67 ms. Allocated memory is still 50.3 MB. Free memory was 22.8 MB in the beginning and 22.6 MB in the end (delta: 245.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 22:13:43,957 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 41.9 MB. Free memory was 28.3 MB in the beginning and 28.3 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.14 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 17.9 MB in the beginning and 28.3 MB in the end (delta: -10.4 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.66 ms. Allocated memory is still 50.3 MB. Free memory was 28.3 MB in the beginning and 26.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.02 ms. Allocated memory is still 50.3 MB. Free memory was 26.8 MB in the beginning and 25.9 MB in the end (delta: 903.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 280.58 ms. Allocated memory is still 50.3 MB. Free memory was 25.9 MB in the beginning and 29.1 MB in the end (delta: -3.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 617.86 ms. Allocated memory is still 50.3 MB. Free memory was 28.7 MB in the beginning and 22.8 MB in the end (delta: 5.9 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.67 ms. Allocated memory is still 50.3 MB. Free memory was 22.8 MB in the beginning and 22.6 MB in the end (delta: 245.5 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: 0.5s, 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 [2020-10-24 22:13:46,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 22:13:46,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 22:13:46,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 22:13:46,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 22:13:46,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 22:13:46,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 22:13:46,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 22:13:46,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 22:13:46,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 22:13:46,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 22:13:46,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 22:13:46,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 22:13:46,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 22:13:46,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 22:13:46,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 22:13:46,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 22:13:46,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 22:13:46,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 22:13:46,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 22:13:46,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 22:13:46,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 22:13:46,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 22:13:46,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 22:13:46,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 22:13:46,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 22:13:46,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 22:13:46,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 22:13:46,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 22:13:46,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 22:13:46,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 22:13:46,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 22:13:46,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 22:13:46,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 22:13:46,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 22:13:46,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 22:13:46,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 22:13:46,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 22:13:46,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 22:13:46,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 22:13:46,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 22:13:46,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 22:13:46,875 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 22:13:46,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 22:13:46,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 22:13:46,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 22:13:46,881 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 22:13:46,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 22:13:46,881 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 22:13:46,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 22:13:46,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 22:13:46,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 22:13:46,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 22:13:46,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 22:13:46,884 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 22:13:46,884 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 22:13:46,885 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 22:13:46,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 22:13:46,885 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 22:13:46,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 22:13:46,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 22:13:46,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 22:13:46,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 22:13:46,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 22:13:46,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 22:13:46,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 22:13:46,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 22:13:46,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 22:13:46,888 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 22:13:46,888 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 22:13:46,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 22:13:46,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 22:13:46,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 22:13:46,889 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2020-10-24 22:13:47,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 22:13:47,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 22:13:47,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 22:13:47,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 22:13:47,369 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 22:13:47,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-24 22:13:47,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec3e9c4aa/63633f5278774d10a8c9d3c44ad4060d/FLAGe0b39d867 [2020-10-24 22:13:48,117 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 22:13:48,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2020-10-24 22:13:48,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec3e9c4aa/63633f5278774d10a8c9d3c44ad4060d/FLAGe0b39d867 [2020-10-24 22:13:48,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec3e9c4aa/63633f5278774d10a8c9d3c44ad4060d [2020-10-24 22:13:48,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 22:13:48,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 22:13:48,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 22:13:48,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 22:13:48,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 22:13:48,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@710c16b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48, skipping insertion in model container [2020-10-24 22:13:48,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 22:13:48,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 22:13:48,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 22:13:48,752 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 22:13:48,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 22:13:48,788 INFO L208 MainTranslator]: Completed translation [2020-10-24 22:13:48,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48 WrapperNode [2020-10-24 22:13:48,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 22:13:48,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 22:13:48,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 22:13:48,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 22:13:48,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 22:13:48,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 22:13:48,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 22:13:48,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 22:13:48,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (1/1) ... [2020-10-24 22:13:48,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 22:13:48,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 22:13:48,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 22:13:48,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 22:13:48,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-24 22:13:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 22:13:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 22:13:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 22:13:48,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 22:13:50,061 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 22:13:50,061 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-24 22:13:50,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:13:50 BoogieIcfgContainer [2020-10-24 22:13:50,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 22:13:50,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 22:13:50,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 22:13:50,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 22:13:50,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:13:48" (1/3) ... [2020-10-24 22:13:50,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4948a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:13:50, skipping insertion in model container [2020-10-24 22:13:50,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:13:48" (2/3) ... [2020-10-24 22:13:50,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4948a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:13:50, skipping insertion in model container [2020-10-24 22:13:50,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:13:50" (3/3) ... [2020-10-24 22:13:50,083 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-10-24 22:13:50,114 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 22:13:50,130 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 22:13:50,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 22:13:50,216 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 22:13:50,216 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 22:13:50,217 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 22:13:50,217 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 22:13:50,217 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 22:13:50,217 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 22:13:50,217 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 22:13:50,217 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 22:13:50,235 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-24 22:13:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 22:13:50,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 22:13:50,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 22:13:50,242 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 22:13:50,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 22:13:50,248 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-10-24 22:13:50,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 22:13:50,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235671488] [2020-10-24 22:13:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-24 22:13:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 22:13:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 22:13:50,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 22:13:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 22:13:50,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 22:13:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 22:13:50,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235671488] [2020-10-24 22:13:50,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 22:13:50,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 22:13:50,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936216268] [2020-10-24 22:13:50,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 22:13:50,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 22:13:50,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 22:13:50,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 22:13:50,461 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-24 22:13:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 22:13:50,479 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-24 22:13:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 22:13:50,480 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 22:13:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 22:13:50,490 INFO L225 Difference]: With dead ends: 20 [2020-10-24 22:13:50,490 INFO L226 Difference]: Without dead ends: 7 [2020-10-24 22:13:50,493 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 [2020-10-24 22:13:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-24 22:13:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-24 22:13:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-24 22:13:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-24 22:13:50,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-24 22:13:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 22:13:50,530 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-24 22:13:50,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 22:13:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-24 22:13:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 22:13:50,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 22:13:50,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 22:13:50,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 22:13:50,745 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 22:13:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 22:13:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-10-24 22:13:50,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 22:13:50,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356525452] [2020-10-24 22:13:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-24 22:13:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 22:13:50,910 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 22:13:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 22:13:51,029 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 22:13:51,061 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-24 22:13:51,062 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 22:13:51,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 22:13:51,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:13:51 BoogieIcfgContainer [2020-10-24 22:13:51,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 22:13:51,296 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 22:13:51,297 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 22:13:51,298 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 22:13:51,299 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:13:50" (3/4) ... [2020-10-24 22:13:51,301 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-24 22:13:51,349 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 22:13:51,349 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 22:13:51,352 INFO L168 Benchmark]: Toolchain (without parser) took 2875.46 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 22.1 MB in the beginning and 32.4 MB in the end (delta: -10.3 MB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. [2020-10-24 22:13:51,353 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 44.0 MB. Free memory is still 29.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 22:13:51,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.79 ms. Allocated memory is still 44.0 MB. Free memory was 21.5 MB in the beginning and 23.1 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-24 22:13:51,354 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.68 ms. Allocated memory is still 44.0 MB. Free memory was 23.1 MB in the beginning and 21.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 22:13:51,355 INFO L168 Benchmark]: Boogie Preprocessor took 27.96 ms. Allocated memory is still 44.0 MB. Free memory was 21.6 MB in the beginning and 20.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 22:13:51,356 INFO L168 Benchmark]: RCFGBuilder took 1203.87 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.4 MB in the beginning and 29.7 MB in the end (delta: -9.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2020-10-24 22:13:51,357 INFO L168 Benchmark]: TraceAbstraction took 1229.98 ms. Allocated memory is still 54.5 MB. Free memory was 29.3 MB in the beginning and 34.3 MB in the end (delta: -5.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 22:13:51,357 INFO L168 Benchmark]: Witness Printer took 53.67 ms. Allocated memory is still 54.5 MB. Free memory was 34.0 MB in the beginning and 32.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 22:13:51,362 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 44.0 MB. Free memory is still 29.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 303.79 ms. Allocated memory is still 44.0 MB. Free memory was 21.5 MB in the beginning and 23.1 MB in the end (delta: -1.5 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.68 ms. Allocated memory is still 44.0 MB. Free memory was 23.1 MB in the beginning and 21.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.96 ms. Allocated memory is still 44.0 MB. Free memory was 21.6 MB in the beginning and 20.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1203.87 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.4 MB in the beginning and 29.7 MB in the end (delta: -9.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1229.98 ms. Allocated memory is still 54.5 MB. Free memory was 29.3 MB in the beginning and 34.3 MB in the end (delta: -5.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 53.67 ms. Allocated memory is still 54.5 MB. Free memory was 34.0 MB in the beginning and 32.4 MB in the end (delta: 1.6 MB). There was no memory consumed. 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: 1.0s, 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...