/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 22:02:22,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:02:22,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:02:22,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:02:22,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:02:22,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:02:22,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:02:22,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:02:22,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:02:22,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:02:22,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:02:22,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:02:22,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:02:22,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:02:22,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:02:22,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:02:22,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:02:22,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:02:22,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:02:22,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:02:22,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:02:22,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:02:22,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:02:22,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:02:22,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:02:22,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:02:22,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:02:22,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:02:22,493 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 22:02:22,508 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:02:22,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:02:22,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:02:22,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:02:22,509 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:02:22,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:02:22,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:02:22,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:02:22,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:02:22,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:02:22,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:02:22,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:02:22,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:02:22,511 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:02:22,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:02:22,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:02:22,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:02:22,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:02:22,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:02:22,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:02:22,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:02:22,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:22,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:02:22,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:02:22,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:02:22,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:02:22,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:22,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:02:22,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:02:22,515 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:02:22,835 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:02:22,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:02:22,851 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:02:22,852 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:02:22,854 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:02:22,855 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-21 22:02:22,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13b38e5a/b85d86a766144bb49e2fed381936bae7/FLAGd89769d2d [2020-07-21 22:02:23,348 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:02:23,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-21 22:02:23,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13b38e5a/b85d86a766144bb49e2fed381936bae7/FLAGd89769d2d [2020-07-21 22:02:23,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13b38e5a/b85d86a766144bb49e2fed381936bae7 [2020-07-21 22:02:23,791 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:02:23,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:02:23,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:23,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:02:23,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:02:23,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:23" (1/1) ... [2020-07-21 22:02:23,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6beeebcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:23, skipping insertion in model container [2020-07-21 22:02:23,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:23" (1/1) ... [2020-07-21 22:02:23,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:02:23,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:02:24,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:24,136 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:02:24,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:24,270 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:02:24,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:24 WrapperNode [2020-07-21 22:02:24,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:24,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:02:24,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:02:24,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:02:24,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:24" (1/1) ... [2020-07-21 22:02:24,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:24" (1/1) ... [2020-07-21 22:02:24,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:24" (1/1) ... [2020-07-21 22:02:24,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:24" (1/1) ... [2020-07-21 22:02:24,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:24" (1/1) ... [2020-07-21 22:02:24,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:24" (1/1) ... [2020-07-21 22:02:24,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:24" (1/1) ... [2020-07-21 22:02:24,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:02:24,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:02:24,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:02:24,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:02:24,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:24" (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 22:02:24,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:02:24,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:02:24,378 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-07-21 22:02:24,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-21 22:02:24,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:02:24,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:02:24,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-21 22:02:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-07-21 22:02:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 22:02:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 22:02:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:02:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:02:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 22:02:24,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:02:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-21 22:02:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:02:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:02:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-07-21 22:02:24,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:02:24,858 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:02:24,858 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-07-21 22:02:24,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:24 BoogieIcfgContainer [2020-07-21 22:02:24,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:02:24,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:02:24,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:02:24,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:02:24,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:02:23" (1/3) ... [2020-07-21 22:02:24,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc8f782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:24, skipping insertion in model container [2020-07-21 22:02:24,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:24" (2/3) ... [2020-07-21 22:02:24,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc8f782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:24, skipping insertion in model container [2020-07-21 22:02:24,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:24" (3/3) ... [2020-07-21 22:02:24,870 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-07-21 22:02:24,880 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:02:24,888 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:02:24,902 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:02:24,925 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:02:24,926 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:02:24,926 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:02:24,926 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:02:24,926 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:02:24,926 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:02:24,927 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:02:24,927 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:02:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-21 22:02:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 22:02:24,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:24,951 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 22:02:24,951 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:24,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-07-21 22:02:24,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:24,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161341032] [2020-07-21 22:02:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:02:25,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:25,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:25,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 22:02:25,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:25,093 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 22:02:25,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:25,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161341032] [2020-07-21 22:02:25,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:25,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 22:02:25,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316614069] [2020-07-21 22:02:25,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 22:02:25,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:25,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 22:02:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 22:02:25,115 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2020-07-21 22:02:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:25,145 INFO L93 Difference]: Finished difference Result 113 states and 177 transitions. [2020-07-21 22:02:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 22:02:25,146 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-21 22:02:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:25,156 INFO L225 Difference]: With dead ends: 113 [2020-07-21 22:02:25,156 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 22:02:25,160 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 22:02:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 22:02:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-21 22:02:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 22:02:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-07-21 22:02:25,203 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-07-21 22:02:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:25,204 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-07-21 22:02:25,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 22:02:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-07-21 22:02:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 22:02:25,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:25,205 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 22:02:25,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:25,422 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:25,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-07-21 22:02:25,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:25,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513692054] [2020-07-21 22:02:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 22:02:25,525 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:02:25,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:02:25,526 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:02:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:02:25,550 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:02:25,579 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:02:25,579 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:02:25,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:25,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:02:25 BoogieIcfgContainer [2020-07-21 22:02:25,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:02:25,830 INFO L168 Benchmark]: Toolchain (without parser) took 2037.00 ms. Allocated memory was 136.8 MB in the beginning and 198.2 MB in the end (delta: 61.3 MB). Free memory was 100.8 MB in the beginning and 95.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 66.7 MB. Max. memory is 7.1 GB. [2020-07-21 22:02:25,831 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 22:02:25,832 INFO L168 Benchmark]: CACSL2BoogieTranslator took 477.24 ms. Allocated memory was 136.8 MB in the beginning and 198.2 MB in the end (delta: 61.3 MB). Free memory was 100.6 MB in the beginning and 174.1 MB in the end (delta: -73.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-07-21 22:02:25,833 INFO L168 Benchmark]: Boogie Preprocessor took 50.14 ms. Allocated memory is still 198.2 MB. Free memory was 174.1 MB in the beginning and 172.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:02:25,834 INFO L168 Benchmark]: RCFGBuilder took 540.46 ms. Allocated memory is still 198.2 MB. Free memory was 172.1 MB in the beginning and 143.2 MB in the end (delta: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. [2020-07-21 22:02:25,835 INFO L168 Benchmark]: TraceAbstraction took 964.18 ms. Allocated memory is still 198.2 MB. Free memory was 142.6 MB in the beginning and 95.4 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:02:25,839 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 477.24 ms. Allocated memory was 136.8 MB in the beginning and 198.2 MB in the end (delta: 61.3 MB). Free memory was 100.6 MB in the beginning and 174.1 MB in the end (delta: -73.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.14 ms. Allocated memory is still 198.2 MB. Free memory was 174.1 MB in the beginning and 172.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 540.46 ms. Allocated memory is still 198.2 MB. Free memory was 172.1 MB in the beginning and 143.2 MB in the end (delta: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 964.18 ms. Allocated memory is still 198.2 MB. Free memory was 142.6 MB in the beginning and 95.4 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 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={26287:0}] [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=9, Zero_fmod={26287:0}] [L131] CALL, EXPR fmod_float(x, y) VAL [\old(x)=0, \old(y)=9, one_fmod=1, Zero_fmod={26287:0}] [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; VAL [\old(x)=0, \old(y)=9, one_fmod=1, x=0, y=9, Zero_fmod={26287:0}] [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)=9, one_fmod=1, sx=2997, x=0, y=9, Zero_fmod={26287:0}] [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); VAL [\old(x)=0, \old(y)=9, hx=0, hy=2139095041, one_fmod=1, sx=2997, x=0, y=9, Zero_fmod={26287:0}] [L131] RET, EXPR fmod_float(x, y) VAL [fmod_float(x, y)=10, one_fmod=1, x=0, y=9, Zero_fmod={26287:0}] [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [one_fmod=1, res=10, res == 0.0f && __signbit_float(res) == 0=0, x=0, y=9, Zero_fmod={26287:0}] [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() VAL [one_fmod=1, res=10, x=0, y=9, Zero_fmod={26287:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, 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, 31 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 77 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...