/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:11:38,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:11:38,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:11:38,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:11:38,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:11:38,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:11:38,753 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:11:38,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:11:38,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:11:38,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:11:38,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:11:38,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:11:38,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:11:38,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:11:38,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:11:38,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:11:38,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:11:38,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:11:38,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:11:38,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:11:38,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:11:38,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:11:38,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:11:38,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:11:38,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:11:38,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:11:38,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:11:38,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:11:38,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:11:38,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:11:38,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:11:38,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:11:38,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:11:38,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:11:38,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:11:38,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:11:38,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:11:38,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:11:38,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:11:38,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:11:38,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:11:38,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:11:38,804 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:11:38,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:11:38,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:11:38,806 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:11:38,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:11:38,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:11:38,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:11:38,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:11:38,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:11:38,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:11:38,807 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:11:38,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:11:38,808 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:11:38,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:11:38,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:11:38,808 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:11:38,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:11:38,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:11:38,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:11:38,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:11:38,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:11:38,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:11:38,810 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:11:39,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:11:39,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:11:39,283 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:11:39,285 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:11:39,285 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:11:39,287 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-09-04 16:11:39,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ba141e86/ab6ff48c4daf4178a12359e98fa4c082/FLAGe63262a38 [2020-09-04 16:11:39,955 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:11:39,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-09-04 16:11:39,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ba141e86/ab6ff48c4daf4178a12359e98fa4c082/FLAGe63262a38 [2020-09-04 16:11:40,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ba141e86/ab6ff48c4daf4178a12359e98fa4c082 [2020-09-04 16:11:40,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:11:40,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:11:40,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:11:40,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:11:40,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:11:40,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:11:40" (1/1) ... [2020-09-04 16:11:40,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a94c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40, skipping insertion in model container [2020-09-04 16:11:40,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:11:40" (1/1) ... [2020-09-04 16:11:40,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:11:40,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:11:40,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:11:40,586 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:11:40,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:11:40,635 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:11:40,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40 WrapperNode [2020-09-04 16:11:40,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:11:40,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:11:40,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:11:40,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:11:40,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40" (1/1) ... [2020-09-04 16:11:40,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40" (1/1) ... [2020-09-04 16:11:40,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40" (1/1) ... [2020-09-04 16:11:40,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40" (1/1) ... [2020-09-04 16:11:40,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40" (1/1) ... [2020-09-04 16:11:40,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40" (1/1) ... [2020-09-04 16:11:40,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40" (1/1) ... [2020-09-04 16:11:40,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:11:40,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:11:40,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:11:40,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:11:40,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40" (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 [2020-09-04 16:11:40,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:11:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:11:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 16:11:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 16:11:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:11:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-04 16:11:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:11:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 16:11:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 16:11:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 16:11:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:11:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:11:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:11:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:11:41,247 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:11:41,247 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 16:11:41,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:11:41 BoogieIcfgContainer [2020-09-04 16:11:41,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:11:41,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:11:41,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:11:41,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:11:41,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:11:40" (1/3) ... [2020-09-04 16:11:41,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eafe7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:11:41, skipping insertion in model container [2020-09-04 16:11:41,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:11:40" (2/3) ... [2020-09-04 16:11:41,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eafe7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:11:41, skipping insertion in model container [2020-09-04 16:11:41,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:11:41" (3/3) ... [2020-09-04 16:11:41,262 INFO L109 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-09-04 16:11:41,273 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:11:41,282 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:11:41,302 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:11:41,328 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:11:41,328 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:11:41,328 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:11:41,328 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:11:41,328 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:11:41,328 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:11:41,329 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:11:41,329 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:11:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-04 16:11:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 16:11:41,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:11:41,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:11:41,358 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:11:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:11:41,365 INFO L82 PathProgramCache]: Analyzing trace with hash -273447452, now seen corresponding path program 1 times [2020-09-04 16:11:41,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:11:41,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286423474] [2020-09-04 16:11:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:11:41,449 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:11:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:11:41,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:11:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:11:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:11:41,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286423474] [2020-09-04 16:11:41,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:11:41,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 16:11:41,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668539102] [2020-09-04 16:11:41,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 16:11:41,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:11:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 16:11:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 16:11:41,566 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-09-04 16:11:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:11:41,599 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-04 16:11:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 16:11:41,601 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-09-04 16:11:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:11:41,612 INFO L225 Difference]: With dead ends: 45 [2020-09-04 16:11:41,613 INFO L226 Difference]: Without dead ends: 26 [2020-09-04 16:11:41,617 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 [2020-09-04 16:11:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-04 16:11:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-04 16:11:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-04 16:11:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-04 16:11:41,663 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 16 [2020-09-04 16:11:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:11:41,664 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-04 16:11:41,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 16:11:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-04 16:11:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 16:11:41,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:11:41,665 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] [2020-09-04 16:11:41,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:11:41,666 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:11:41,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:11:41,667 INFO L82 PathProgramCache]: Analyzing trace with hash 112425219, now seen corresponding path program 1 times [2020-09-04 16:11:41,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:11:41,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208558683] [2020-09-04 16:11:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:11:41,669 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:11:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:11:41,700 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:11:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:11:41,714 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:11:41,737 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:11:41,737 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:11:41,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:11:41,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:11:41 BoogieIcfgContainer [2020-09-04 16:11:41,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:11:41,759 INFO L168 Benchmark]: Toolchain (without parser) took 1448.45 ms. Allocated memory was 136.8 MB in the beginning and 202.9 MB in the end (delta: 66.1 MB). Free memory was 101.4 MB in the beginning and 142.6 MB in the end (delta: -41.2 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:41,760 INFO L168 Benchmark]: CDTParser took 0.97 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-04 16:11:41,761 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.54 ms. Allocated memory is still 136.8 MB. Free memory was 100.9 MB in the beginning and 91.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:41,762 INFO L168 Benchmark]: Boogie Preprocessor took 161.53 ms. Allocated memory was 136.8 MB in the beginning and 202.9 MB in the end (delta: 66.1 MB). Free memory was 91.0 MB in the beginning and 181.1 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:41,763 INFO L168 Benchmark]: RCFGBuilder took 452.87 ms. Allocated memory is still 202.9 MB. Free memory was 181.1 MB in the beginning and 166.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:41,764 INFO L168 Benchmark]: TraceAbstraction took 502.07 ms. Allocated memory is still 202.9 MB. Free memory was 165.8 MB in the beginning and 142.6 MB in the end (delta: 23.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-09-04 16:11:41,769 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.97 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.54 ms. Allocated memory is still 136.8 MB. Free memory was 100.9 MB in the beginning and 91.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 161.53 ms. Allocated memory was 136.8 MB in the beginning and 202.9 MB in the end (delta: 66.1 MB). Free memory was 91.0 MB in the beginning and 181.1 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 452.87 ms. Allocated memory is still 202.9 MB. Free memory was 181.1 MB in the beginning and 166.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 502.07 ms. Allocated memory is still 202.9 MB. Free memory was 165.8 MB in the beginning and 142.6 MB in the end (delta: 23.2 MB). Peak memory consumption was 23.2 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: No data available, 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...