/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:00:08,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:00:08,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:00:08,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:00:08,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:00:08,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:00:08,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:00:08,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:00:08,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:00:08,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:00:08,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:00:08,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:00:08,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:00:08,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:00:08,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:00:08,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:00:08,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:00:08,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:00:08,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:00:08,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:00:08,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:00:08,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:00:08,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:00:08,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:00:08,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:00:08,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:00:08,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:00:08,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:00:08,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:00:08,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:00:08,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:00:08,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:00:08,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:00:08,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:00:08,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:00:08,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:00:08,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:00:08,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:00:08,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:00:08,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:00:08,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:00:08,343 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 02:00:08,398 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:00:08,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:00:08,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:00:08,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:00:08,401 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:00:08,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:00:08,402 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:00:08,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:00:08,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:00:08,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:00:08,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:00:08,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:00:08,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:00:08,405 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:00:08,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:00:08,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:00:08,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:00:08,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:00:08,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:00:08,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:00:08,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:00:08,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:00:08,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:00:08,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:00:08,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:00:08,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:00:08,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:00:08,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:00:08,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:00:08,408 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:00:08,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:00:08,941 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:00:08,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:00:08,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:00:08,949 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:00:08,950 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-09-25 02:00:09,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/900581975/1b26e454c9b04892b4dea7ef49d1f001/FLAG16768bd1a [2020-09-25 02:00:09,584 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:00:09,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-09-25 02:00:09,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/900581975/1b26e454c9b04892b4dea7ef49d1f001/FLAG16768bd1a [2020-09-25 02:00:09,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/900581975/1b26e454c9b04892b4dea7ef49d1f001 [2020-09-25 02:00:09,933 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:00:09,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:00:09,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:00:09,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:00:09,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:00:09,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:00:09" (1/1) ... [2020-09-25 02:00:09,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c31b5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:09, skipping insertion in model container [2020-09-25 02:00:09,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:00:09" (1/1) ... [2020-09-25 02:00:09,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:00:09,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:00:10,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:00:10,252 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:00:10,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:00:10,292 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:00:10,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:10 WrapperNode [2020-09-25 02:00:10,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:00:10,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:00:10,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:00:10,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:00:10,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:10" (1/1) ... [2020-09-25 02:00:10,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:10" (1/1) ... [2020-09-25 02:00:10,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:10" (1/1) ... [2020-09-25 02:00:10,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:10" (1/1) ... [2020-09-25 02:00:10,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:10" (1/1) ... [2020-09-25 02:00:10,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:10" (1/1) ... [2020-09-25 02:00:10,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:10" (1/1) ... [2020-09-25 02:00:10,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:00:10,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:00:10,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:00:10,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:00:10,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:10" (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 02:00:10,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:00:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:00:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:00:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:00:10,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:00:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-25 02:00:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:00:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:00:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:00:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:00:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 02:00:10,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:00:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:00:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:00:10,730 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:00:10,730 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 02:00:10,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:00:10 BoogieIcfgContainer [2020-09-25 02:00:10,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:00:10,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:00:10,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:00:10,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:00:10,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:00:09" (1/3) ... [2020-09-25 02:00:10,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273cf695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:00:10, skipping insertion in model container [2020-09-25 02:00:10,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:00:10" (2/3) ... [2020-09-25 02:00:10,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273cf695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:00:10, skipping insertion in model container [2020-09-25 02:00:10,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:00:10" (3/3) ... [2020-09-25 02:00:10,751 INFO L109 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-09-25 02:00:10,762 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:00:10,772 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:00:10,791 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:00:10,819 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:00:10,820 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:00:10,820 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:00:10,820 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:00:10,820 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:00:10,820 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:00:10,820 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:00:10,820 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:00:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-25 02:00:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 02:00:10,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:00:10,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:00:10,851 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:00:10,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:00:10,859 INFO L82 PathProgramCache]: Analyzing trace with hash -273447452, now seen corresponding path program 1 times [2020-09-25 02:00:10,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:00:10,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62800835] [2020-09-25 02:00:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:00:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:00:10,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:00:11,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:00:11,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 02:00:11,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:00:11,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-25 02:00:11,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:00:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:00:11,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 02:00:11,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:00:11,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:00:11,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:00:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:00:11,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:00:11,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:00:11,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:00:11,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:00:11,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:00:11,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:00:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:00:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:00:11,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:00:11,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:00:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:00:11,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62800835] [2020-09-25 02:00:11,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:00:11,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 02:00:11,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175103862] [2020-09-25 02:00:11,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 02:00:11,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:00:11,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 02:00:11,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 02:00:11,107 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-09-25 02:00:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:00:11,133 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-25 02:00:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 02:00:11,134 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-09-25 02:00:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:00:11,144 INFO L225 Difference]: With dead ends: 45 [2020-09-25 02:00:11,144 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 02:00:11,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 02:00:11,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 02:00:11,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-25 02:00:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-25 02:00:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-25 02:00:11,192 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 16 [2020-09-25 02:00:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:00:11,192 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-25 02:00:11,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 02:00:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-25 02:00:11,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 02:00:11,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:00:11,194 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, 1, 1, 1, 1, 1] [2020-09-25 02:00:11,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:00:11,195 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:00:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:00:11,195 INFO L82 PathProgramCache]: Analyzing trace with hash 112425219, now seen corresponding path program 1 times [2020-09-25 02:00:11,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:00:11,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385020411] [2020-09-25 02:00:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:00:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 02:00:11,225 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 02:00:11,225 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 02:00:11,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:00:11,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:00:11 BoogieIcfgContainer [2020-09-25 02:00:11,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:00:11,254 INFO L168 Benchmark]: Toolchain (without parser) took 1316.35 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 102.5 MB in the beginning and 141.2 MB in the end (delta: -38.7 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-09-25 02:00:11,255 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:00:11,256 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.96 ms. Allocated memory is still 146.3 MB. Free memory was 101.8 MB in the beginning and 91.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-25 02:00:11,257 INFO L168 Benchmark]: Boogie Preprocessor took 119.32 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 91.8 MB in the beginning and 180.7 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-25 02:00:11,258 INFO L168 Benchmark]: RCFGBuilder took 322.96 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 166.6 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-25 02:00:11,259 INFO L168 Benchmark]: TraceAbstraction took 512.53 ms. Allocated memory is still 202.4 MB. Free memory was 166.6 MB in the beginning and 141.2 MB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-09-25 02:00:11,263 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 348.96 ms. Allocated memory is still 146.3 MB. Free memory was 101.8 MB in the beginning and 91.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.32 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 91.8 MB in the beginning and 180.7 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 322.96 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 166.6 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 512.53 ms. Allocated memory is still 202.4 MB. Free memory was 166.6 MB in the beginning and 141.2 MB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 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 35, overapproximation of someBinaryArithmeticFLOAToperation at line 28. Possible FailurePath: [L18] float x = __VERIFIER_nondet_float() ; [L19] float exp = 1.0 ; [L20] float term = 1.0 ; [L21] unsigned int count = 1 ; [L22] float result = 2*(1/(1-x)) ; [L23] int temp ; [L25] COND TRUE 1 [L27] term = term * (x/count) [L28] exp = exp + term [L29] count++ [L31] temp = __VERIFIER_nondet_int() [L32] COND TRUE temp ==0 [L35] CALL __VERIFIER_assert( result >= exp ) [L12] COND TRUE !(cond) [L12] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 0.1s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 225 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...