/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 [2020-07-20 10:45:24,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:24,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:24,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:24,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:24,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:24,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:24,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:24,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:24,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:24,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:24,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:24,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:24,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:24,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:24,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:24,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:24,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:24,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:24,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:24,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:24,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:24,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:24,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:24,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:24,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:24,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:24,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:24,444 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 [2020-07-20 10:45:24,467 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:24,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:24,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:24,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:24,470 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:24,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:24,470 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:24,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:24,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:24,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:24,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:24,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:24,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:24,473 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:24,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:24,473 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:24,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:24,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:24,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:24,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:24,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:24,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:24,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:24,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:24,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:24,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:24,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:24,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:24,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:24,476 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 [2020-07-20 10:45:24,798 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:24,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:24,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:24,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:24,817 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:24,818 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-20 10:45:24,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/356b6db10/2383dcb781e347e1984b05816eb2ecb6/FLAG487fdd9f5 [2020-07-20 10:45:25,369 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:25,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-20 10:45:25,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/356b6db10/2383dcb781e347e1984b05816eb2ecb6/FLAG487fdd9f5 [2020-07-20 10:45:25,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/356b6db10/2383dcb781e347e1984b05816eb2ecb6 [2020-07-20 10:45:25,800 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:25,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:25,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:25,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:25,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:25,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:25" (1/1) ... [2020-07-20 10:45:25,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dbe1777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:25, skipping insertion in model container [2020-07-20 10:45:25,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:25" (1/1) ... [2020-07-20 10:45:25,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:25,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:26,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:26,306 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:26,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:26,386 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:26,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26 WrapperNode [2020-07-20 10:45:26,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:26,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:26,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:26,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:26,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (1/1) ... [2020-07-20 10:45:26,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:26,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:26,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:26,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:26,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (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 [2020-07-20 10:45:26,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:26,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:26,535 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-07-20 10:45:26,535 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 10:45:26,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:26,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 10:45:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-07-20 10:45:26,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 10:45:26,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 10:45:26,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 10:45:26,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 10:45:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 10:45:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 10:45:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 10:45:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-07-20 10:45:26,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:27,019 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:27,020 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-07-20 10:45:27,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:27 BoogieIcfgContainer [2020-07-20 10:45:27,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:27,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:27,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:27,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:27,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:25" (1/3) ... [2020-07-20 10:45:27,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:27, skipping insertion in model container [2020-07-20 10:45:27,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:26" (2/3) ... [2020-07-20 10:45:27,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:27, skipping insertion in model container [2020-07-20 10:45:27,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:27" (3/3) ... [2020-07-20 10:45:27,033 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-07-20 10:45:27,043 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:27,052 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:27,066 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:27,089 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:27,089 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:27,089 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:27,090 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:27,090 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:27,090 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:27,090 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:27,091 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-20 10:45:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 10:45:27,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:27,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:27,122 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:27,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:27,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-07-20 10:45:27,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:27,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882818646] [2020-07-20 10:45:27,138 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 [2020-07-20 10:45:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:27,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:45:27,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:45:27,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:27,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882818646] [2020-07-20 10:45:27,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:27,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:45:27,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993480872] [2020-07-20 10:45:27,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:45:27,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:45:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:27,321 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2020-07-20 10:45:27,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:27,355 INFO L93 Difference]: Finished difference Result 113 states and 177 transitions. [2020-07-20 10:45:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:45:27,356 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-20 10:45:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:27,367 INFO L225 Difference]: With dead ends: 113 [2020-07-20 10:45:27,368 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 10:45:27,372 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 [2020-07-20 10:45:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 10:45:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 10:45:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 10:45:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-07-20 10:45:27,423 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-07-20 10:45:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:27,423 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-07-20 10:45:27,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:45:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-07-20 10:45:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 10:45:27,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:27,425 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] [2020-07-20 10:45:27,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:27,632 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:27,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-07-20 10:45:27,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:27,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104211556] [2020-07-20 10:45:27,634 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 [2020-07-20 10:45:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:27,724 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:45:27,749 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:45:27,779 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:45:27,780 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:45:27,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:28,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:28 BoogieIcfgContainer [2020-07-20 10:45:28,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:45:28,037 INFO L168 Benchmark]: Toolchain (without parser) took 2234.76 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 101.1 MB in the beginning and 101.4 MB in the end (delta: -357.5 kB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:28,038 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 144.7 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 10:45:28,039 INFO L168 Benchmark]: CACSL2BoogieTranslator took 582.60 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 100.7 MB in the beginning and 177.3 MB in the end (delta: -76.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:28,040 INFO L168 Benchmark]: Boogie Preprocessor took 70.89 ms. Allocated memory is still 201.9 MB. Free memory was 177.3 MB in the beginning and 174.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:28,041 INFO L168 Benchmark]: RCFGBuilder took 566.04 ms. Allocated memory is still 201.9 MB. Free memory was 174.6 MB in the beginning and 146.9 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:28,042 INFO L168 Benchmark]: TraceAbstraction took 1008.85 ms. Allocated memory is still 201.9 MB. Free memory was 146.3 MB in the beginning and 101.4 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-07-20 10:45:28,046 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 144.7 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 582.60 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 100.7 MB in the beginning and 177.3 MB in the end (delta: -76.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.89 ms. Allocated memory is still 201.9 MB. Free memory was 177.3 MB in the beginning and 174.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 566.04 ms. Allocated memory is still 201.9 MB. Free memory was 174.6 MB in the beginning and 146.9 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1008.85 ms. Allocated memory is still 201.9 MB. Free memory was 146.3 MB in the beginning and 101.4 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 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)=9, \old(Zero_fmod)=6, one_fmod=1, Zero_fmod={3:0}] [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=8, Zero_fmod={3:0}] [L131] CALL, EXPR fmod_float(x, y) VAL [\old(x)=0, \old(y)=8, one_fmod=1, Zero_fmod={3:0}] [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; VAL [\old(x)=0, \old(y)=8, one_fmod=1, x=0, y=8, Zero_fmod={3:0}] [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)=8, one_fmod=1, sx=4294967295, x=0, y=8, Zero_fmod={3:0}] [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); VAL [\old(x)=0, \old(y)=8, hx=0, hy=2139095041, one_fmod=1, sx=4294967295, x=0, y=8, Zero_fmod={3:0}] [L131] RET, EXPR fmod_float(x, y) VAL [fmod_float(x, y)=9, one_fmod=1, x=0, y=8, Zero_fmod={3:0}] [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [one_fmod=1, res=9, res == 0.0f && __signbit_float(res) == 0=0, x=0, y=8, Zero_fmod={3:0}] [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() VAL [one_fmod=1, res=9, x=0, y=8, Zero_fmod={3:0}] - 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...