/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:12,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:12,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:12,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:12,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:12,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:12,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:12,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:12,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:12,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:12,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:12,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:12,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:12,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:12,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:12,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:12,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:12,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:12,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:12,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:12,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:12,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:12,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:12,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:12,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:12,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:12,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:12,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:12,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:40:12,291 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:12,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:12,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:12,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:12,293 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:12,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:12,294 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:12,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:12,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:12,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:12,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:12,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:12,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:12,296 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:12,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:12,297 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:12,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:12,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:12,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:12,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:12,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:12,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:12,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:12,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:12,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:12,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:12,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:12,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:12,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:12,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:40:12,575 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:12,589 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:12,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:12,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:12,594 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:12,595 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-21 10:40:12,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41e0ee5ee/e56a839a0a814759be27d2bd5a774027/FLAG0652279a4 [2020-07-21 10:40:13,156 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:13,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-21 10:40:13,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41e0ee5ee/e56a839a0a814759be27d2bd5a774027/FLAG0652279a4 [2020-07-21 10:40:13,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41e0ee5ee/e56a839a0a814759be27d2bd5a774027 [2020-07-21 10:40:13,525 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:13,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:13,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:13,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:13,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:13,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:13" (1/1) ... [2020-07-21 10:40:13,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@423f00c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:13, skipping insertion in model container [2020-07-21 10:40:13,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:13" (1/1) ... [2020-07-21 10:40:13,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:13,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:13,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:13,852 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:13,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:14,014 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:14,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14 WrapperNode [2020-07-21 10:40:14,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:14,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:14,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:14,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:14,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (1/1) ... [2020-07-21 10:40:14,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:14,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:14,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:14,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:14,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (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 [2020-07-21 10:40:14,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:14,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:14,130 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-07-21 10:40:14,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-21 10:40:14,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-21 10:40:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-07-21 10:40:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 10:40:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 10:40:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 10:40:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 10:40:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 10:40:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 10:40:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-21 10:40:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-07-21 10:40:14,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:14,617 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:14,618 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-07-21 10:40:14,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:14 BoogieIcfgContainer [2020-07-21 10:40:14,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:14,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:14,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:14,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:14,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:13" (1/3) ... [2020-07-21 10:40:14,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f652cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:14, skipping insertion in model container [2020-07-21 10:40:14,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:14" (2/3) ... [2020-07-21 10:40:14,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f652cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:14, skipping insertion in model container [2020-07-21 10:40:14,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:14" (3/3) ... [2020-07-21 10:40:14,633 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-07-21 10:40:14,644 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:14,652 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:14,667 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:14,693 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:14,693 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:14,693 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:14,693 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:14,694 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:14,694 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:14,694 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:14,694 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-21 10:40:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 10:40:14,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:14,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:14,725 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-07-21 10:40:14,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:14,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839561917] [2020-07-21 10:40:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:14,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 10:40:14,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:40:14,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:14,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839561917] [2020-07-21 10:40:14,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:14,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 10:40:14,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849245568] [2020-07-21 10:40:14,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 10:40:14,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:14,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 10:40:14,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 10:40:14,890 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2020-07-21 10:40:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:14,917 INFO L93 Difference]: Finished difference Result 113 states and 177 transitions. [2020-07-21 10:40:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 10:40:14,919 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-21 10:40:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:14,929 INFO L225 Difference]: With dead ends: 113 [2020-07-21 10:40:14,930 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 10:40:14,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 10:40:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 10:40:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-21 10:40:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 10:40:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-07-21 10:40:14,978 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-07-21 10:40:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:14,979 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-07-21 10:40:14,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 10:40:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-07-21 10:40:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 10:40:14,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:14,980 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] [2020-07-21 10:40:15,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:15,196 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-07-21 10:40:15,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:15,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905078328] [2020-07-21 10:40:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:15,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:15,347 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:15,393 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 10:40:15,394 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 10:40:15,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:15,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:40:15 BoogieIcfgContainer [2020-07-21 10:40:15,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:40:15,652 INFO L168 Benchmark]: Toolchain (without parser) took 2124.40 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 103.0 MB in the end (delta: -2.1 MB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:15,657 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:40:15,658 INFO L168 Benchmark]: CACSL2BoogieTranslator took 485.27 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.5 MB in the beginning and 178.7 MB in the end (delta: -78.3 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:15,659 INFO L168 Benchmark]: Boogie Preprocessor took 54.22 ms. Allocated memory is still 202.4 MB. Free memory was 178.7 MB in the beginning and 176.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:15,660 INFO L168 Benchmark]: RCFGBuilder took 552.99 ms. Allocated memory is still 202.4 MB. Free memory was 176.1 MB in the beginning and 148.1 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:15,662 INFO L168 Benchmark]: TraceAbstraction took 1023.63 ms. Allocated memory is still 202.4 MB. Free memory was 147.5 MB in the beginning and 103.0 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:15,671 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 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 485.27 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.5 MB in the beginning and 178.7 MB in the end (delta: -78.3 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.22 ms. Allocated memory is still 202.4 MB. Free memory was 178.7 MB in the beginning and 176.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 552.99 ms. Allocated memory is still 202.4 MB. Free memory was 176.1 MB in the beginning and 148.1 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1023.63 ms. Allocated memory is still 202.4 MB. Free memory was 147.5 MB in the beginning and 103.0 MB in the end (delta: 44.5 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of bitwiseXor at line 31, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; VAL [\old(one_fmod)=2, \old(Zero_fmod)=5, \old(Zero_fmod)=7, one_fmod=1, Zero_fmod={8857:0}] [L126] float x = 0.0f; [L127] float y = __VERIFIER_nondet_float(); [L129] COND TRUE (y < 0.0f || y > 0.0f) VAL [one_fmod=1, x=0, y=11, Zero_fmod={8857:0}] [L131] CALL, EXPR fmod_float(x, y) VAL [\old(x)=0, \old(y)=11, one_fmod=1, Zero_fmod={8857:0}] [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; VAL [\old(x)=0, \old(y)=11, one_fmod=1, x=0, y=11, Zero_fmod={8857:0}] [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff VAL [\old(x)=0, \old(y)=11, one_fmod=1, sx=11797, x=0, y=11, Zero_fmod={8857:0}] [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); VAL [\old(x)=0, \old(y)=11, hx=0, hy=2139095041, one_fmod=1, sx=11797, x=0, y=11, Zero_fmod={8857:0}] [L131] RET, EXPR fmod_float(x, y) VAL [fmod_float(x, y)=12, one_fmod=1, x=0, y=11, Zero_fmod={8857:0}] [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [one_fmod=1, res=12, res == 0.0f && __signbit_float(res) == 0=0, x=0, y=11, Zero_fmod={8857:0}] [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() VAL [one_fmod=1, res=12, x=0, y=11, Zero_fmod={8857:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 78 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 89 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...