/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 NUM_VARIABLES --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 [2020-07-20 16:27:47,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:27:47,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:27:47,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:27:47,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:27:47,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:27:47,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:27:47,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:27:47,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:27:47,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:27:47,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:27:47,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:27:47,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:27:47,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:27:47,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:27:47,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:27:47,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:27:47,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:27:47,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:27:47,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:27:47,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:27:47,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:27:47,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:27:47,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:27:47,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:27:47,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 16:27:47,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 16:27:47,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 16:27:47,721 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 16:27:47,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 16:27:47,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 16:27:47,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 16:27:47,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 16:27:47,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:27:47,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:27:47,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:27:47,725 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 16:27:47,739 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:27:47,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:27:47,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:27:47,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:27:47,741 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:27:47,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:27:47,742 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:27:47,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:27:47,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:27:47,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:27:47,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:27:47,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:27:47,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:27:47,743 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:27:47,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:27:47,743 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:27:47,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:27:47,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:27:47,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:27:47,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:27:47,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:27:47,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:27:47,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:27:47,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:27:47,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:27:47,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:27:47,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:47,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:27:47,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:27:47,746 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 -> NUM_VARIABLES 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 [2020-07-20 16:27:48,019 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:27:48,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:27:48,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:27:48,036 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:27:48,037 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:27:48,037 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-20 16:27:48,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc3568a7/6774c4e646ec4951adde6f2b3b543b1f/FLAGde7e4944f [2020-07-20 16:27:48,613 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:27:48,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-20 16:27:48,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc3568a7/6774c4e646ec4951adde6f2b3b543b1f/FLAGde7e4944f [2020-07-20 16:27:48,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc3568a7/6774c4e646ec4951adde6f2b3b543b1f [2020-07-20 16:27:48,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:27:48,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:27:48,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:27:48,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:27:48,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:27:48,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:27:48" (1/1) ... [2020-07-20 16:27:48,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c3108f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:48, skipping insertion in model container [2020-07-20 16:27:48,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:27:48" (1/1) ... [2020-07-20 16:27:48,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:27:48,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:27:49,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:27:49,212 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:27:49,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:27:49,352 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:27:49,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:49 WrapperNode [2020-07-20 16:27:49,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:27:49,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:27:49,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:27:49,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:27:49,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:49" (1/1) ... [2020-07-20 16:27:49,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:49" (1/1) ... [2020-07-20 16:27:49,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:49" (1/1) ... [2020-07-20 16:27:49,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:49" (1/1) ... [2020-07-20 16:27:49,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:49" (1/1) ... [2020-07-20 16:27:49,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:49" (1/1) ... [2020-07-20 16:27:49,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:49" (1/1) ... [2020-07-20 16:27:49,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:27:49,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:27:49,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:27:49,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:27:49,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:49" (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 16:27:49,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:27:49,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:27:49,463 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-07-20 16:27:49,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 16:27:49,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:27:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:27:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 16:27:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-07-20 16:27:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 16:27:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 16:27:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 16:27:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 16:27:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 16:27:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 16:27:49,465 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 16:27:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:27:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:27:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-07-20 16:27:49,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:27:49,906 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:27:49,907 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-07-20 16:27:49,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:27:49 BoogieIcfgContainer [2020-07-20 16:27:49,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:27:49,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:27:49,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:27:49,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:27:49,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:27:48" (1/3) ... [2020-07-20 16:27:49,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fbaa3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:27:49, skipping insertion in model container [2020-07-20 16:27:49,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:49" (2/3) ... [2020-07-20 16:27:49,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fbaa3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:27:49, skipping insertion in model container [2020-07-20 16:27:49,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:27:49" (3/3) ... [2020-07-20 16:27:49,935 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-07-20 16:27:49,945 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:27:49,953 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:27:49,967 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:27:49,995 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:27:49,996 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:27:49,996 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:27:49,996 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:27:49,996 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:27:49,996 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:27:49,996 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:27:49,997 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:27:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-20 16:27:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 16:27:50,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:27:50,024 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 16:27:50,025 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:27:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:27:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-07-20 16:27:50,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:27:50,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769170762] [2020-07-20 16:27:50,038 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 [2020-07-20 16:27:50,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:27:50,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:27:50,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 16:27:50,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:27:50,228 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 16:27:50,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:27:50,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769170762] [2020-07-20 16:27:50,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:27:50,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 16:27:50,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237819320] [2020-07-20 16:27:50,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 16:27:50,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:27:50,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 16:27:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 16:27:50,258 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2020-07-20 16:27:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:27:50,292 INFO L93 Difference]: Finished difference Result 113 states and 177 transitions. [2020-07-20 16:27:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 16:27:50,293 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-20 16:27:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:27:50,305 INFO L225 Difference]: With dead ends: 113 [2020-07-20 16:27:50,305 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 16:27:50,309 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 16:27:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 16:27:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 16:27:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 16:27:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-07-20 16:27:50,354 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-07-20 16:27:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:27:50,354 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-07-20 16:27:50,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 16:27:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-07-20 16:27:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 16:27:50,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:27:50,356 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 16:27:50,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:50,565 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:27:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:27:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-07-20 16:27:50,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:27:50,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48043065] [2020-07-20 16:27:50,568 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 [2020-07-20 16:27:50,666 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:27:50,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 16:27:50,667 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 16:27:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 16:27:50,691 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 16:27:50,721 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 16:27:50,721 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 16:27:50,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:50,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:27:50 BoogieIcfgContainer [2020-07-20 16:27:50,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:27:50,989 INFO L168 Benchmark]: Toolchain (without parser) took 2036.87 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 101.7 MB in the beginning and 99.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:50,990 INFO L168 Benchmark]: CDTParser took 0.23 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: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 16:27:50,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.47 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 101.3 MB in the beginning and 178.1 MB in the end (delta: -76.8 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:50,994 INFO L168 Benchmark]: Boogie Preprocessor took 50.04 ms. Allocated memory is still 201.3 MB. Free memory was 178.1 MB in the beginning and 175.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:50,995 INFO L168 Benchmark]: RCFGBuilder took 507.63 ms. Allocated memory is still 201.3 MB. Free memory was 175.3 MB in the beginning and 147.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:50,997 INFO L168 Benchmark]: TraceAbstraction took 1066.09 ms. Allocated memory is still 201.3 MB. Free memory was 146.3 MB in the beginning and 99.2 MB in the end (delta: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:51,009 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 400.47 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 101.3 MB in the beginning and 178.1 MB in the end (delta: -76.8 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.04 ms. Allocated memory is still 201.3 MB. Free memory was 178.1 MB in the beginning and 175.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 507.63 ms. Allocated memory is still 201.3 MB. Free memory was 175.3 MB in the beginning and 147.0 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1066.09 ms. Allocated memory is still 201.3 MB. Free memory was 146.3 MB in the beginning and 99.2 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)=9, \old(Zero_fmod)=6, one_fmod=1, Zero_fmod={5856:0}] [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={5856:0}] [L131] CALL, EXPR fmod_float(x, y) VAL [\old(x)=0, \old(y)=11, one_fmod=1, Zero_fmod={5856:0}] [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={5856:0}] [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=1142, x=0, y=11, Zero_fmod={5856:0}] [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=1142, x=0, y=11, Zero_fmod={5856:0}] [L131] RET, EXPR fmod_float(x, y) VAL [fmod_float(x, y)=12, one_fmod=1, x=0, y=11, Zero_fmod={5856:0}] [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={5856:0}] [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={5856:0}] - 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 40 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 85 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...