/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 0.1.25-72570d3 [2020-08-22 18:32:47,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:32:47,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:32:47,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:32:47,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:32:47,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:32:47,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:32:47,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:32:47,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:32:47,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:32:47,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:32:47,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:32:47,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:32:47,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:32:47,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:32:47,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:32:47,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:32:47,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:32:47,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:32:47,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:32:47,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:32:47,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:32:47,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:32:47,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:32:47,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:32:47,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:32:47,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:32:47,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:32:47,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:32:47,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:32:47,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:32:47,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:32:47,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:32:47,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:32:47,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:32:47,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:32:47,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:32:47,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:32:47,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:32:47,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:32:47,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:32:47,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:32:47,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:32:47,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:32:47,247 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:32:47,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:32:47,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:32:47,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:32:47,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:32:47,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:32:47,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:32:47,249 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:32:47,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:32:47,559 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:32:47,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:32:47,564 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:32:47,565 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:32:47,565 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-08-22 18:32:47,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/badf876ad/f9ed29430e134af48db42ac3f0079817/FLAG80de4a780 [2020-08-22 18:32:48,086 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:32:48,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-08-22 18:32:48,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/badf876ad/f9ed29430e134af48db42ac3f0079817/FLAG80de4a780 [2020-08-22 18:32:48,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/badf876ad/f9ed29430e134af48db42ac3f0079817 [2020-08-22 18:32:48,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:32:48,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:32:48,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:32:48,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:32:48,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:32:48,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:32:48" (1/1) ... [2020-08-22 18:32:48,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@562bf3a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48, skipping insertion in model container [2020-08-22 18:32:48,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:32:48" (1/1) ... [2020-08-22 18:32:48,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:32:48,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:32:48,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:32:48,754 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:32:48,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:32:48,785 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:32:48,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48 WrapperNode [2020-08-22 18:32:48,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:32:48,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:32:48,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:32:48,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:32:48,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48" (1/1) ... [2020-08-22 18:32:48,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48" (1/1) ... [2020-08-22 18:32:48,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48" (1/1) ... [2020-08-22 18:32:48,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48" (1/1) ... [2020-08-22 18:32:48,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48" (1/1) ... [2020-08-22 18:32:48,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48" (1/1) ... [2020-08-22 18:32:48,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48" (1/1) ... [2020-08-22 18:32:48,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:32:48,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:32:48,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:32:48,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:32:48,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 18:32:48,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:32:48,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:32:48,962 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 18:32:48,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 18:32:48,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:32:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-22 18:32:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:32:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 18:32:48,964 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 18:32:48,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 18:32:48,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:32:48,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:32:48,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:32:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:32:49,243 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:32:49,243 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 18:32:49,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:32:49 BoogieIcfgContainer [2020-08-22 18:32:49,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:32:49,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:32:49,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:32:49,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:32:49,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:32:48" (1/3) ... [2020-08-22 18:32:49,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e388fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:32:49, skipping insertion in model container [2020-08-22 18:32:49,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:32:48" (2/3) ... [2020-08-22 18:32:49,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e388fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:32:49, skipping insertion in model container [2020-08-22 18:32:49,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:32:49" (3/3) ... [2020-08-22 18:32:49,275 INFO L109 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-08-22 18:32:49,285 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:32:49,292 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:32:49,306 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:32:49,327 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:32:49,327 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:32:49,327 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:32:49,327 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:32:49,327 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:32:49,327 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:32:49,327 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:32:49,328 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:32:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 18:32:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 18:32:49,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:32:49,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:32:49,349 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:32:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:32:49,354 INFO L82 PathProgramCache]: Analyzing trace with hash -273447452, now seen corresponding path program 1 times [2020-08-22 18:32:49,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:32:49,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031897263] [2020-08-22 18:32:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:32:49,411 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:32:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:32:49,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:32:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:32:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:32:49,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031897263] [2020-08-22 18:32:49,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:32:49,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 18:32:49,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919422748] [2020-08-22 18:32:49,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 18:32:49,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:32:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 18:32:49,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 18:32:49,511 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-08-22 18:32:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:32:49,538 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-22 18:32:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 18:32:49,539 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-08-22 18:32:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:32:49,548 INFO L225 Difference]: With dead ends: 45 [2020-08-22 18:32:49,548 INFO L226 Difference]: Without dead ends: 26 [2020-08-22 18:32:49,552 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 [2020-08-22 18:32:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-22 18:32:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-22 18:32:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 18:32:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-08-22 18:32:49,593 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 16 [2020-08-22 18:32:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:32:49,594 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-08-22 18:32:49,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 18:32:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-08-22 18:32:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 18:32:49,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:32:49,596 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] [2020-08-22 18:32:49,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:32:49,597 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:32:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:32:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash 112425219, now seen corresponding path program 1 times [2020-08-22 18:32:49,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:32:49,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782725982] [2020-08-22 18:32:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:32:49,600 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:32:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:32:49,628 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:32:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:32:49,641 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:32:49,661 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 18:32:49,661 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 18:32:49,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:32:49,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:32:49 BoogieIcfgContainer [2020-08-22 18:32:49,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:32:49,684 INFO L168 Benchmark]: Toolchain (without parser) took 1176.43 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 101.2 MB in the beginning and 140.2 MB in the end (delta: -39.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:32:49,686 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-22 18:32:49,688 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.85 ms. Allocated memory is still 137.4 MB. Free memory was 100.7 MB in the beginning and 91.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:32:49,690 INFO L168 Benchmark]: Boogie Preprocessor took 112.47 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 91.1 MB in the beginning and 177.6 MB in the end (delta: -86.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:32:49,691 INFO L168 Benchmark]: RCFGBuilder took 349.39 ms. Allocated memory is still 199.8 MB. Free memory was 177.6 MB in the beginning and 163.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-22 18:32:49,692 INFO L168 Benchmark]: TraceAbstraction took 418.05 ms. Allocated memory is still 199.8 MB. Free memory was 163.1 MB in the beginning and 140.2 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-08-22 18:32:49,702 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 278.85 ms. Allocated memory is still 137.4 MB. Free memory was 100.7 MB in the beginning and 91.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.47 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 91.1 MB in the beginning and 177.6 MB in the end (delta: -86.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.39 ms. Allocated memory is still 199.8 MB. Free memory was 177.6 MB in the beginning and 163.8 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 418.05 ms. Allocated memory is still 199.8 MB. Free memory was 163.1 MB in the beginning and 140.2 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 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: 0.3s, 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...