/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/float_int_inv_square.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:57:17,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:57:17,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:57:17,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:57:17,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:57:17,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:57:17,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:57:17,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:57:17,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:57:17,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:57:17,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:57:17,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:57:17,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:57:17,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:57:17,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:57:17,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:57:17,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:57:17,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:57:17,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:57:17,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:57:17,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:57:17,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:57:17,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:57:17,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:57:17,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:57:17,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:57:17,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:57:17,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:57:17,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:57:17,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:57:17,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:57:17,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:57:17,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:57:17,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:57:17,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:57:17,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:57:17,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:57:17,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:57:17,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:57:17,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:57:17,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:57:17,361 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 [2020-09-25 09:57:17,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:57:17,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:57:17,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:57:17,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:57:17,408 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:57:17,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:57:17,409 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:57:17,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:57:17,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:57:17,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:57:17,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:57:17,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:57:17,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:57:17,412 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:57:17,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:57:17,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:57:17,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:57:17,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:57:17,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:57:17,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:57:17,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:57:17,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:57:17,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:57:17,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:57:17,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:57:17,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:57:17,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:57:17,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:57:17,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:57:17,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=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=0.1;log-additional-information=true; [2020-09-25 09:57:17,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:57:17,890 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:57:17,895 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:57:17,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:57:17,897 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:57:17,899 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/float_int_inv_square.c [2020-09-25 09:57:17,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bc3ac458/6ab5830d7e8346208421c1bbd3b0c944/FLAG63cb3f01e [2020-09-25 09:57:18,537 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:57:18,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/float_int_inv_square.c [2020-09-25 09:57:18,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bc3ac458/6ab5830d7e8346208421c1bbd3b0c944/FLAG63cb3f01e [2020-09-25 09:57:18,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bc3ac458/6ab5830d7e8346208421c1bbd3b0c944 [2020-09-25 09:57:18,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:57:18,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:57:18,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:57:18,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:57:18,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:57:18,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:57:18" (1/1) ... [2020-09-25 09:57:18,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112bbb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:18, skipping insertion in model container [2020-09-25 09:57:18,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:57:18" (1/1) ... [2020-09-25 09:57:18,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:57:18,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:57:19,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:57:19,143 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:57:19,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:57:19,179 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:57:19,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19 WrapperNode [2020-09-25 09:57:19,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:57:19,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:57:19,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:57:19,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:57:19,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19" (1/1) ... [2020-09-25 09:57:19,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19" (1/1) ... [2020-09-25 09:57:19,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19" (1/1) ... [2020-09-25 09:57:19,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19" (1/1) ... [2020-09-25 09:57:19,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19" (1/1) ... [2020-09-25 09:57:19,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19" (1/1) ... [2020-09-25 09:57:19,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19" (1/1) ... [2020-09-25 09:57:19,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:57:19,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:57:19,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:57:19,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:57:19,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19" (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 [2020-09-25 09:57:19,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:57:19,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:57:19,383 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:57:19,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:57:19,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:57:19,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:57:19,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:57:19,384 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:57:19,384 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:57:19,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:57:19,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:57:19,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:57:19,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:57:19,596 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:57:19,597 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 09:57:19,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:57:19 BoogieIcfgContainer [2020-09-25 09:57:19,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:57:19,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:57:19,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:57:19,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:57:19,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:57:18" (1/3) ... [2020-09-25 09:57:19,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec05a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:57:19, skipping insertion in model container [2020-09-25 09:57:19,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19" (2/3) ... [2020-09-25 09:57:19,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec05a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:57:19, skipping insertion in model container [2020-09-25 09:57:19,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:57:19" (3/3) ... [2020-09-25 09:57:19,612 INFO L109 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2020-09-25 09:57:19,639 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:57:19,667 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:57:19,695 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:57:19,729 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:57:19,729 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:57:19,729 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:57:19,729 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:57:19,730 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:57:19,730 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:57:19,730 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:57:19,730 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:57:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 09:57:19,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 09:57:19,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:57:19,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:57:19,762 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:57:19,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:57:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash -865761349, now seen corresponding path program 1 times [2020-09-25 09:57:19,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:57:19,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388260797] [2020-09-25 09:57:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:57:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 09:57:19,901 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 09:57:19,902 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 09:57:19,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:57:19,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:57:19 BoogieIcfgContainer [2020-09-25 09:57:19,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:57:19,928 INFO L168 Benchmark]: Toolchain (without parser) took 1027.79 ms. Allocated memory was 146.3 MB in the beginning and 205.0 MB in the end (delta: 58.7 MB). Free memory was 104.8 MB in the beginning and 158.8 MB in the end (delta: -54.1 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2020-09-25 09:57:19,929 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 146.3 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 09:57:19,930 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.10 ms. Allocated memory is still 146.3 MB. Free memory was 104.1 MB in the beginning and 94.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 09:57:19,931 INFO L168 Benchmark]: Boogie Preprocessor took 119.88 ms. Allocated memory was 146.3 MB in the beginning and 205.0 MB in the end (delta: 58.7 MB). Free memory was 94.8 MB in the beginning and 183.8 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-25 09:57:19,932 INFO L168 Benchmark]: RCFGBuilder took 301.01 ms. Allocated memory is still 205.0 MB. Free memory was 183.2 MB in the beginning and 170.8 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:57:19,933 INFO L168 Benchmark]: TraceAbstraction took 320.42 ms. Allocated memory is still 205.0 MB. Free memory was 170.1 MB in the beginning and 158.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-09-25 09:57:19,937 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 146.3 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.10 ms. Allocated memory is still 146.3 MB. Free memory was 104.1 MB in the beginning and 94.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.88 ms. Allocated memory was 146.3 MB in the beginning and 205.0 MB in the end (delta: 58.7 MB). Free memory was 94.8 MB in the beginning and 183.8 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 301.01 ms. Allocated memory is still 205.0 MB. Free memory was 183.2 MB in the beginning and 170.8 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 320.42 ms. Allocated memory is still 205.0 MB. Free memory was 170.1 MB in the beginning and 158.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 20, overapproximation of someBinaryArithmeticFLOAToperation at line 19. Possible FailurePath: [L13] int x; [L14] float y, z; [L16] x = __VERIFIER_nondet_int() [L17] CALL assume_abort_if_not(x >= -10 && x <= 10) [L7] COND FALSE !(!cond) [L17] RET assume_abort_if_not(x >= -10 && x <= 10) [L19] y = x*x - 4.f [L20] CALL __VERIFIER_assert(y != 0.f) [L9] COND TRUE !(cond) [L9] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, 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=30occurred 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, 20 NumberOfCodeBlocks, 20 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...