/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 0.2.0-7d8eed3 [2020-11-07 00:25:10,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:25:10,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:25:10,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:25:10,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:25:10,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:25:10,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:25:10,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:25:10,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:25:10,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:25:10,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:25:10,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:25:10,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:25:10,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:25:10,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:25:10,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:25:10,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:25:10,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:25:10,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:25:10,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:25:10,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:25:10,458 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:25:10,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:25:10,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:25:10,460 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:25:10,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:25:10,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:25:10,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:25:10,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:25:10,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:25:10,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:25:10,461 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:25:10,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:25:10,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:25:10,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:25:10,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:25:10,462 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:25:10,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:25:10,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:25:10,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:25:10,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:25:10,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:25:10,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:25:10,464 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:25:10,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:25:10,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:25:10,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:25:10,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:25:10,840 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:25:10,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-11-07 00:25:10,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6573198de/94d33f21adce4a0285e5d1a0da715b7a/FLAGdbd30fb3e [2020-11-07 00:25:11,662 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:25:11,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-floats-scientific-comp/loop1-2.c [2020-11-07 00:25:11,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6573198de/94d33f21adce4a0285e5d1a0da715b7a/FLAGdbd30fb3e [2020-11-07 00:25:12,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6573198de/94d33f21adce4a0285e5d1a0da715b7a [2020-11-07 00:25:12,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:25:12,049 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:25:12,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:12,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:25:12,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:25:12,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:12" (1/1) ... [2020-11-07 00:25:12,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc7be10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12, skipping insertion in model container [2020-11-07 00:25:12,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:12" (1/1) ... [2020-11-07 00:25:12,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:25:12,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:25:12,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:12,317 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:25:12,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:12,362 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:25:12,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12 WrapperNode [2020-11-07 00:25:12,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:12,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:25:12,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:25:12,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:25:12,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12" (1/1) ... [2020-11-07 00:25:12,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12" (1/1) ... [2020-11-07 00:25:12,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12" (1/1) ... [2020-11-07 00:25:12,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12" (1/1) ... [2020-11-07 00:25:12,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12" (1/1) ... [2020-11-07 00:25:12,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12" (1/1) ... [2020-11-07 00:25:12,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12" (1/1) ... [2020-11-07 00:25:12,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:25:12,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:25:12,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:25:12,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:25:12,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12" (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 [2020-11-07 00:25:12,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:25:12,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:25:12,501 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:25:12,501 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 00:25:12,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 00:25:12,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:25:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-11-07 00:25:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:25:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:25:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:25:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:25:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 00:25:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 00:25:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:25:12,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:25:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:25:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:25:12,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:25:12,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:25:12,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:25:12,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:25:12,872 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:25:12,872 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 00:25:12,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:12 BoogieIcfgContainer [2020-11-07 00:25:12,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:25:12,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:25:12,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:25:12,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:25:12,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:25:12" (1/3) ... [2020-11-07 00:25:12,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc3cbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:12, skipping insertion in model container [2020-11-07 00:25:12,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:12" (2/3) ... [2020-11-07 00:25:12,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc3cbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:12, skipping insertion in model container [2020-11-07 00:25:12,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:12" (3/3) ... [2020-11-07 00:25:12,920 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2020-11-07 00:25:12,954 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:25:12,959 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:25:12,972 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:25:13,006 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:25:13,007 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:25:13,007 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:25:13,007 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:25:13,007 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:25:13,007 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:25:13,007 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:25:13,008 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:25:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-11-07 00:25:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 00:25:13,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:13,046 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] [2020-11-07 00:25:13,046 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:13,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:13,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1402496090, now seen corresponding path program 1 times [2020-11-07 00:25:13,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:13,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782407452] [2020-11-07 00:25:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:13,164 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:13,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:25:13,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782407452] [2020-11-07 00:25:13,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:13,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 00:25:13,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070515641] [2020-11-07 00:25:13,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 00:25:13,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:13,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 00:25:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 00:25:13,530 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-11-07 00:25:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:13,636 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-07 00:25:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 00:25:13,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-11-07 00:25:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:13,647 INFO L225 Difference]: With dead ends: 58 [2020-11-07 00:25:13,647 INFO L226 Difference]: Without dead ends: 35 [2020-11-07 00:25:13,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 00:25:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-07 00:25:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-07 00:25:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-07 00:25:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-11-07 00:25:13,702 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 25 [2020-11-07 00:25:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:13,702 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-11-07 00:25:13,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 00:25:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-11-07 00:25:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-07 00:25:13,704 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:13,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:13,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:25:13,705 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1202200620, now seen corresponding path program 1 times [2020-11-07 00:25:13,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:13,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850366299] [2020-11-07 00:25:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:13,713 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:25:13,772 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:25:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:25:13,795 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:25:13,825 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:25:13,826 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:25:13,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:25:13,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:25:13 BoogieIcfgContainer [2020-11-07 00:25:13,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:25:13,854 INFO L168 Benchmark]: Toolchain (without parser) took 1807.20 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 98.5 MB in the end (delta: 28.5 MB). Peak memory consumption was 30.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:13,855 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 126.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:25:13,858 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.01 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:13,861 INFO L168 Benchmark]: Boogie Preprocessor took 47.22 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:13,862 INFO L168 Benchmark]: RCFGBuilder took 461.73 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 100.2 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:13,862 INFO L168 Benchmark]: TraceAbstraction took 973.03 ms. Allocated memory is still 151.0 MB. Free memory was 99.8 MB in the beginning and 98.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:13,866 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 126.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 312.01 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.22 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 461.73 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 100.2 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 973.03 ms. Allocated memory is still 151.0 MB. Free memory was 99.8 MB in the beginning and 98.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 9]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 30. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L37] CALL __VERIFIER_assert( result >= exp ) [L14] COND TRUE !(cond) [L14] CALL reach_error() [L9] __assert_fail("0", "loop1-2.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 25 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred 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...