/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/inv_square_int.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:57:18,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:57:18,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:57:18,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:57:18,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:57:18,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:57:18,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:57:18,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:57:18,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:57:18,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:57:18,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:57:18,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:57:18,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:57:18,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:57:18,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:57:18,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:57:18,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:57:18,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:57:18,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:57:18,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:57:18,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:57:18,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:57:18,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:57:18,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:57:18,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:57:18,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:57:18,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:57:18,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:57:18,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:57:18,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:57:18,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:57:18,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:57:18,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:57:18,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:57:18,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:57:18,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:57:18,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:57:18,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:57:18,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:57:18,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:57:18,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:57:18,313 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 09:57:18,361 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:57:18,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:57:18,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:57:18,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:57:18,364 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:57:18,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:57:18,365 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:57:18,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:57:18,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:57:18,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:57:18,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:57:18,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:57:18,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:57:18,367 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:57:18,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:57:18,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:57:18,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:57:18,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:57:18,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:57:18,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:57:18,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:57:18,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:57:18,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:57:18,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:57:18,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:57:18,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:57:18,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:57:18,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:57:18,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:57:18,370 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 09:57:18,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:57:18,890 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:57:18,895 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:57:18,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:57:18,897 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:57:18,898 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_square_int.c [2020-09-25 09:57:18,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd8df11de/93b01d1d714842c79464af1487c3bb36/FLAGacaa1edd5 [2020-09-25 09:57:19,498 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:57:19,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/inv_square_int.c [2020-09-25 09:57:19,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd8df11de/93b01d1d714842c79464af1487c3bb36/FLAGacaa1edd5 [2020-09-25 09:57:19,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd8df11de/93b01d1d714842c79464af1487c3bb36 [2020-09-25 09:57:19,888 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:57:19,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:57:19,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:57:19,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:57:19,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:57:19,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:57:19" (1/1) ... [2020-09-25 09:57:19,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21af3704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:19, skipping insertion in model container [2020-09-25 09:57:19,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:57:19" (1/1) ... [2020-09-25 09:57:19,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:57:19,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:57:20,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:57:20,181 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:57:20,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:57:20,213 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:57:20,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:20 WrapperNode [2020-09-25 09:57:20,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:57:20,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:57:20,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:57:20,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:57:20,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:20" (1/1) ... [2020-09-25 09:57:20,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:20" (1/1) ... [2020-09-25 09:57:20,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:20" (1/1) ... [2020-09-25 09:57:20,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:20" (1/1) ... [2020-09-25 09:57:20,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:20" (1/1) ... [2020-09-25 09:57:20,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:20" (1/1) ... [2020-09-25 09:57:20,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:20" (1/1) ... [2020-09-25 09:57:20,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:57:20,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:57:20,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:57:20,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:57:20,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:20" (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 09:57:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:57:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:57:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 09:57:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:57:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:57:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:57:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 09:57:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 09:57:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 09:57:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:57:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:57:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:57:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:57:20,626 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:57:20,627 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 09:57:20,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:57:20 BoogieIcfgContainer [2020-09-25 09:57:20,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:57:20,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:57:20,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:57:20,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:57:20,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:57:19" (1/3) ... [2020-09-25 09:57:20,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c40fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:57:20, skipping insertion in model container [2020-09-25 09:57:20,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:57:20" (2/3) ... [2020-09-25 09:57:20,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c40fa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:57:20, skipping insertion in model container [2020-09-25 09:57:20,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:57:20" (3/3) ... [2020-09-25 09:57:20,643 INFO L109 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-09-25 09:57:20,655 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:57:20,666 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:57:20,697 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:57:20,738 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:57:20,739 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:57:20,739 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:57:20,739 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:57:20,739 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:57:20,740 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:57:20,740 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:57:20,740 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:57:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 09:57:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 09:57:20,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:57:20,780 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 09:57:20,781 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:57:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:57:20,790 INFO L82 PathProgramCache]: Analyzing trace with hash -865761349, now seen corresponding path program 1 times [2020-09-25 09:57:20,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:57:20,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35853106] [2020-09-25 09:57:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:57:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 09:57:20,958 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 09:57:20,959 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 09:57:20,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:57:20,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:57:20 BoogieIcfgContainer [2020-09-25 09:57:20,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:57:20,990 INFO L168 Benchmark]: Toolchain (without parser) took 1097.79 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 104.4 MB in the beginning and 158.1 MB in the end (delta: -53.7 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-09-25 09:57:20,991 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 09:57:20,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.55 ms. Allocated memory is still 147.8 MB. Free memory was 103.7 MB in the beginning and 94.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:57:20,993 INFO L168 Benchmark]: Boogie Preprocessor took 121.66 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 94.3 MB in the beginning and 183.2 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 09:57:20,994 INFO L168 Benchmark]: RCFGBuilder took 296.30 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 170.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-25 09:57:20,995 INFO L168 Benchmark]: TraceAbstraction took 351.47 ms. Allocated memory is still 204.5 MB. Free memory was 169.8 MB in the beginning and 158.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-09-25 09:57:20,999 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.55 ms. Allocated memory is still 147.8 MB. Free memory was 103.7 MB in the beginning and 94.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.66 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 94.3 MB in the beginning and 183.2 MB in the end (delta: -88.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.30 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 170.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 351.47 ms. Allocated memory is still 204.5 MB. Free memory was 169.8 MB in the beginning and 158.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: 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() [L19] CALL assume_abort_if_not(x >= -10 && x <= 10) [L9] COND FALSE !(!cond) [L19] RET assume_abort_if_not(x >= -10 && x <= 10) [L21] y = x*x - 2.f [L22] CALL __VERIFIER_assert(y != 0.f) [L11] COND TRUE !(cond) [L11] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 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=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...