/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/floats-esbmc-regression/Float_div.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:09:50,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:09:50,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:09:50,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:09:50,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:09:50,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:09:50,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:09:50,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:09:50,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:09:50,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:09:50,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:09:50,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:09:50,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:09:50,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:09:50,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:09:50,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:09:50,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:09:50,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:09:50,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:09:50,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:09:50,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:09:50,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:09:50,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:09:50,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:09:50,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:09:50,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:09:50,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:09:50,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:09:50,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:09:50,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:09:50,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:09:50,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:09:50,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:09:50,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:09:50,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:09:50,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:09:50,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:09:50,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:09:50,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:09:50,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:09:50,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:09:50,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:09:50,842 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:09:50,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:09:50,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:09:50,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:09:50,845 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:09:50,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:09:50,846 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:09:50,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:09:50,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:09:50,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:09:50,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:09:50,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:09:50,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:09:50,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:09:50,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:09:50,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:09:50,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:09:50,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:09:50,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:09:50,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:09:50,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:09:50,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:09:50,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:09:50,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:09:50,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:09:50,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:09:50,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:09:50,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:09:50,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:09:50,853 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:09:51,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:09:51,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:09:51,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:09:51,285 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:09:51,286 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:09:51,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-esbmc-regression/Float_div.i [2020-10-29 09:09:51,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d73e69ba8/37c673e46d7b4954aac19f9944baee6a/FLAGc5b60da81 [2020-10-29 09:09:52,102 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:09:52,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/floats-esbmc-regression/Float_div.i [2020-10-29 09:09:52,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d73e69ba8/37c673e46d7b4954aac19f9944baee6a/FLAGc5b60da81 [2020-10-29 09:09:52,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d73e69ba8/37c673e46d7b4954aac19f9944baee6a [2020-10-29 09:09:52,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:09:52,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:09:52,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:09:52,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:09:52,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:09:52,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:09:52" (1/1) ... [2020-10-29 09:09:52,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf29089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52, skipping insertion in model container [2020-10-29 09:09:52,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:09:52" (1/1) ... [2020-10-29 09:09:52,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:09:52,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:09:52,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:09:52,722 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:09:52,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:09:52,767 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:09:52,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52 WrapperNode [2020-10-29 09:09:52,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:09:52,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:09:52,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:09:52,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:09:52,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52" (1/1) ... [2020-10-29 09:09:52,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52" (1/1) ... [2020-10-29 09:09:52,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52" (1/1) ... [2020-10-29 09:09:52,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52" (1/1) ... [2020-10-29 09:09:52,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52" (1/1) ... [2020-10-29 09:09:52,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52" (1/1) ... [2020-10-29 09:09:52,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52" (1/1) ... [2020-10-29 09:09:52,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:09:52,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:09:52,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:09:52,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:09:52,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-29 09:09:52,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:09:52,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:09:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:09:52,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:09:52,951 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:09:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:09:52,952 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:09:52,952 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:09:52,952 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:09:52,952 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:09:52,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:09:52,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:09:52,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:09:52,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:09:52,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:09:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:09:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:09:52,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:09:52,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:09:53,264 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:09:53,265 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:09:53,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:09:53 BoogieIcfgContainer [2020-10-29 09:09:53,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:09:53,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:09:53,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:09:53,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:09:53,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:09:52" (1/3) ... [2020-10-29 09:09:53,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4010b572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:09:53, skipping insertion in model container [2020-10-29 09:09:53,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:09:52" (2/3) ... [2020-10-29 09:09:53,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4010b572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:09:53, skipping insertion in model container [2020-10-29 09:09:53,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:09:53" (3/3) ... [2020-10-29 09:09:53,280 INFO L111 eAbstractionObserver]: Analyzing ICFG Float_div.i [2020-10-29 09:09:53,298 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:09:53,305 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:09:53,323 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:09:53,410 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:09:53,411 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:09:53,411 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:09:53,411 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:09:53,411 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:09:53,411 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:09:53,412 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:09:53,412 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:09:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-29 09:09:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:09:53,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:09:53,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:09:53,480 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:09:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:09:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash 454397783, now seen corresponding path program 1 times [2020-10-29 09:09:53,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:09:53,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122164819] [2020-10-29 09:09:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:09:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:09:53,651 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:09:53,652 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:09:53,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:09:53,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:09:53 BoogieIcfgContainer [2020-10-29 09:09:53,673 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:09:53,676 INFO L168 Benchmark]: Toolchain (without parser) took 1196.35 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 131.3 MB in the end (delta: 286.6 kB). Peak memory consumption was 535.7 kB. Max. memory is 8.0 GB. [2020-10-29 09:09:53,677 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 156.2 MB. Free memory is still 128.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:09:53,678 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.31 ms. Allocated memory is still 156.2 MB. Free memory was 130.9 MB in the beginning and 121.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:09:53,679 INFO L168 Benchmark]: Boogie Preprocessor took 70.59 ms. Allocated memory is still 156.2 MB. Free memory was 121.1 MB in the beginning and 119.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:09:53,680 INFO L168 Benchmark]: RCFGBuilder took 423.43 ms. Allocated memory is still 156.2 MB. Free memory was 119.7 MB in the beginning and 107.3 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:09:53,681 INFO L168 Benchmark]: TraceAbstraction took 403.36 ms. Allocated memory is still 156.2 MB. Free memory was 106.9 MB in the beginning and 131.3 MB in the end (delta: -24.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:09:53,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 156.2 MB. Free memory is still 128.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 283.31 ms. Allocated memory is still 156.2 MB. Free memory was 130.9 MB in the beginning and 121.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.59 ms. Allocated memory is still 156.2 MB. Free memory was 121.1 MB in the beginning and 119.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 423.43 ms. Allocated memory is still 156.2 MB. Free memory was 119.7 MB in the beginning and 107.3 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 403.36 ms. Allocated memory is still 156.2 MB. Free memory was 106.9 MB in the beginning and 131.3 MB in the end (delta: -24.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 29, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L20] float x = 1.0f; [L21] float x1 = x/2.5f; [L23] COND FALSE !(x1 != x) [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) [L13] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "Float_div.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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...