/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/float-newlib/float_req_bl_1072a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:24:53,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:24:53,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:24:53,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:24:53,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:24:53,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:24:53,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:24:53,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:24:53,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:24:53,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:24:53,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:24:53,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:24:53,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:24:53,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:24:53,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:24:53,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:24:53,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:24:53,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:24:53,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:24:53,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:24:53,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:24:53,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:24:53,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:24:53,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:24:53,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:24:53,932 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 00:24:53,956 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:24:53,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:24:53,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:24:53,962 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:24:53,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:24:53,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:24:53,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:24:53,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:24:53,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:24:53,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:24:53,964 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:24:53,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:24:53,964 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:24:53,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:24:53,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:24:53,965 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:24:53,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:24:53,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:24:53,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:24:53,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:24:53,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:24:53,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:24:53,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:24:54,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:24:54,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:24:54,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:24:54,416 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:24:54,416 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:24:54,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072a.c [2020-11-07 00:24:54,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8022247e0/026c3b95c0004fe6b5216e78228d2c13/FLAGcb9474bcd [2020-11-07 00:24:55,192 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:24:55,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072a.c [2020-11-07 00:24:55,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8022247e0/026c3b95c0004fe6b5216e78228d2c13/FLAGcb9474bcd [2020-11-07 00:24:55,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8022247e0/026c3b95c0004fe6b5216e78228d2c13 [2020-11-07 00:24:55,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:24:55,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:24:55,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:24:55,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:24:55,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:24:55,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:24:55" (1/1) ... [2020-11-07 00:24:55,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55aaacd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55, skipping insertion in model container [2020-11-07 00:24:55,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:24:55" (1/1) ... [2020-11-07 00:24:55,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:24:55,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:24:55,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:24:55,819 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:24:55,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:24:55,862 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:24:55,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55 WrapperNode [2020-11-07 00:24:55,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:24:55,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:24:55,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:24:55,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:24:55,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55" (1/1) ... [2020-11-07 00:24:55,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55" (1/1) ... [2020-11-07 00:24:55,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55" (1/1) ... [2020-11-07 00:24:55,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55" (1/1) ... [2020-11-07 00:24:55,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55" (1/1) ... [2020-11-07 00:24:55,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55" (1/1) ... [2020-11-07 00:24:55,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55" (1/1) ... [2020-11-07 00:24:55,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:24:55,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:24:55,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:24:55,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:24:55,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55" (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 00:24:55,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:24:55,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:24:55,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:24:55,985 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-11-07 00:24:55,986 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-11-07 00:24:55,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:24:55,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:24:55,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:24:55,986 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:24:55,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:24:55,987 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-11-07 00:24:55,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-07 00:24:55,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:24:55,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:24:55,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:24:55,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-11-07 00:24:55,988 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-11-07 00:24:55,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:24:55,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:24:55,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:24:55,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:24:56,528 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:24:56,529 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-07 00:24:56,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:24:56 BoogieIcfgContainer [2020-11-07 00:24:56,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:24:56,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:24:56,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:24:56,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:24:56,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:24:55" (1/3) ... [2020-11-07 00:24:56,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8a61ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:24:56, skipping insertion in model container [2020-11-07 00:24:56,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:24:55" (2/3) ... [2020-11-07 00:24:56,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8a61ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:24:56, skipping insertion in model container [2020-11-07 00:24:56,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:24:56" (3/3) ... [2020-11-07 00:24:56,540 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072a.c [2020-11-07 00:24:56,556 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:24:56,560 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:24:56,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:24:56,599 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:24:56,600 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:24:56,600 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:24:56,600 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:24:56,600 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:24:56,600 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:24:56,600 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:24:56,600 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:24:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2020-11-07 00:24:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 00:24:56,630 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:24:56,631 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:24:56,632 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:24:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:24:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1064733081, now seen corresponding path program 1 times [2020-11-07 00:24:56,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:24:56,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506074590] [2020-11-07 00:24:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:24:56,734 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:24:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:24:56,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:24:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:24:57,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:24:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:24:57,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 00:24:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:24:57,081 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 00:24:57,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506074590] [2020-11-07 00:24:57,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:24:57,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 00:24:57,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359983162] [2020-11-07 00:24:57,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 00:24:57,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:24:57,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 00:24:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 00:24:57,123 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 4 states. [2020-11-07 00:24:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:24:57,484 INFO L93 Difference]: Finished difference Result 161 states and 185 transitions. [2020-11-07 00:24:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 00:24:57,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-11-07 00:24:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:24:57,498 INFO L225 Difference]: With dead ends: 161 [2020-11-07 00:24:57,498 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 00:24:57,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:24:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 00:24:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-11-07 00:24:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-07 00:24:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-11-07 00:24:57,571 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 41 [2020-11-07 00:24:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:24:57,572 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-11-07 00:24:57,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 00:24:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-11-07 00:24:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-07 00:24:57,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:24:57,575 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, 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 00:24:57,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:24:57,576 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:24:57,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:24:57,577 INFO L82 PathProgramCache]: Analyzing trace with hash -688613008, now seen corresponding path program 1 times [2020-11-07 00:24:57,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:24:57,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101703234] [2020-11-07 00:24:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:24:57,583 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:24:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:24:57,687 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:24:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:24:57,757 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:24:57,804 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:24:57,805 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:24:57,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:24:57,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:24:57 BoogieIcfgContainer [2020-11-07 00:24:57,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:24:57,849 INFO L168 Benchmark]: Toolchain (without parser) took 2302.29 ms. Allocated memory is still 164.6 MB. Free memory was 140.2 MB in the beginning and 70.9 MB in the end (delta: 69.3 MB). Peak memory consumption was 70.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:24:57,851 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 164.6 MB. Free memory is still 137.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:24:57,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.71 ms. Allocated memory is still 164.6 MB. Free memory was 139.7 MB in the beginning and 129.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:24:57,856 INFO L168 Benchmark]: Boogie Preprocessor took 44.85 ms. Allocated memory is still 164.6 MB. Free memory was 129.5 MB in the beginning and 127.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:24:57,857 INFO L168 Benchmark]: RCFGBuilder took 622.00 ms. Allocated memory is still 164.6 MB. Free memory was 127.7 MB in the beginning and 139.1 MB in the end (delta: -11.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:24:57,858 INFO L168 Benchmark]: TraceAbstraction took 1311.30 ms. Allocated memory is still 164.6 MB. Free memory was 138.5 MB in the beginning and 70.9 MB in the end (delta: 67.6 MB). Peak memory consumption was 67.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:24:57,865 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 164.6 MB. Free memory is still 137.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 306.71 ms. Allocated memory is still 164.6 MB. Free memory was 139.7 MB in the beginning and 129.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.85 ms. Allocated memory is still 164.6 MB. Free memory was 129.5 MB in the beginning and 127.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 622.00 ms. Allocated memory is still 164.6 MB. Free memory was 127.7 MB in the beginning and 139.1 MB in the end (delta: -11.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1311.30 ms. Allocated memory is still 164.6 MB. Free memory was 138.5 MB in the beginning and 70.9 MB in the end (delta: 67.6 MB). Peak memory consumption was 67.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAToperation at line 40, overapproximation of bitwiseAnd at line 53. Possible FailurePath: [L64] float x = 1.0f / 0.0f; [L65] CALL, EXPR trunc_float(x) [L15] __int32_t signbit, w, exponent_less_127; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L21] signbit = w & 0x80000000 [L22] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 [L23] COND FALSE !(exponent_less_127 < 23) [L39] COND TRUE exponent_less_127 == 255 [L40] return x + x; [L65] RET, EXPR trunc_float(x) [L65] float res = trunc_float(x); [L68] CALL, EXPR isinf_float(res) [L47] __int32_t ix; [L49] ieee_float_shape_type gf_u; [L50] gf_u.value = (x) [L51] EXPR gf_u.word [L51] (ix) = gf_u.word [L53] ix &= 0x7fffffff [L54] return ((ix) == 0x7f800000L); [L68] RET, EXPR isinf_float(res) [L68] COND TRUE !isinf_float(res) [L69] CALL reach_error() [L4] __assert_fail("0", "float_req_bl_1072a.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 17 SDslu, 53 SDs, 0 SdLazy, 103 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred 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...