/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 00:31:10,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 00:31:10,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 00:31:10,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 00:31:10,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 00:31:10,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 00:31:10,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 00:31:10,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 00:31:10,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 00:31:10,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 00:31:10,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 00:31:10,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 00:31:10,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 00:31:10,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 00:31:10,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 00:31:10,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 00:31:10,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 00:31:10,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 00:31:10,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 00:31:10,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 00:31:10,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 00:31:10,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 00:31:10,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 00:31:10,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 00:31:10,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 00:31:10,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 00:31:10,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 00:31:10,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 00:31:10,144 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 00:31:10,181 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 00:31:10,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 00:31:10,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 00:31:10,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 00:31:10,183 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 00:31:10,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 00:31:10,184 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 00:31:10,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 00:31:10,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 00:31:10,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 00:31:10,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 00:31:10,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 00:31:10,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 00:31:10,185 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 00:31:10,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 00:31:10,185 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 00:31:10,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 00:31:10,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 00:31:10,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 00:31:10,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 00:31:10,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 00:31:10,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 00:31:10,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 00:31:10,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 00:31:10,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 00:31:10,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 00:31:10,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:10,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 00:31:10,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 00:31:10,190 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 00:31:10,473 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 00:31:10,485 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 00:31:10,489 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 00:31:10,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 00:31:10,490 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 00:31:10,491 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-21 00:31:10,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b92da06dc/e4ca299dec12483ebc4776bd24b7bca5/FLAG5a8f8478e [2020-07-21 00:31:10,976 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 00:31:10,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-07-21 00:31:10,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b92da06dc/e4ca299dec12483ebc4776bd24b7bca5/FLAG5a8f8478e [2020-07-21 00:31:11,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b92da06dc/e4ca299dec12483ebc4776bd24b7bca5 [2020-07-21 00:31:11,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 00:31:11,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 00:31:11,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:11,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 00:31:11,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 00:31:11,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:11" (1/1) ... [2020-07-21 00:31:11,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5276ab18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11, skipping insertion in model container [2020-07-21 00:31:11,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:11" (1/1) ... [2020-07-21 00:31:11,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 00:31:11,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 00:31:11,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:11,719 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 00:31:11,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 00:31:11,884 INFO L208 MainTranslator]: Completed translation [2020-07-21 00:31:11,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11 WrapperNode [2020-07-21 00:31:11,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 00:31:11,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 00:31:11,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 00:31:11,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 00:31:11,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11" (1/1) ... [2020-07-21 00:31:11,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11" (1/1) ... [2020-07-21 00:31:11,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11" (1/1) ... [2020-07-21 00:31:11,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11" (1/1) ... [2020-07-21 00:31:11,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11" (1/1) ... [2020-07-21 00:31:11,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11" (1/1) ... [2020-07-21 00:31:11,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11" (1/1) ... [2020-07-21 00:31:11,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 00:31:11,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 00:31:11,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 00:31:11,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 00:31:11,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11" (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 00:31:12,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 00:31:12,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 00:31:12,005 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-07-21 00:31:12,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-21 00:31:12,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 00:31:12,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 00:31:12,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-21 00:31:12,006 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-07-21 00:31:12,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 00:31:12,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 00:31:12,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 00:31:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 00:31:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 00:31:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 00:31:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-21 00:31:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 00:31:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 00:31:12,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-07-21 00:31:12,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 00:31:12,474 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 00:31:12,474 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-07-21 00:31:12,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:12 BoogieIcfgContainer [2020-07-21 00:31:12,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 00:31:12,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 00:31:12,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 00:31:12,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 00:31:12,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:11" (1/3) ... [2020-07-21 00:31:12,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed2b2a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:12, skipping insertion in model container [2020-07-21 00:31:12,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:11" (2/3) ... [2020-07-21 00:31:12,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed2b2a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:12, skipping insertion in model container [2020-07-21 00:31:12,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:12" (3/3) ... [2020-07-21 00:31:12,487 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-07-21 00:31:12,497 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 00:31:12,505 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 00:31:12,519 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 00:31:12,539 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 00:31:12,539 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 00:31:12,539 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 00:31:12,540 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 00:31:12,540 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 00:31:12,540 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 00:31:12,540 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 00:31:12,540 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 00:31:12,559 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-07-21 00:31:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 00:31:12,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:12,566 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 00:31:12,566 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:12,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-07-21 00:31:12,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:12,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139230594] [2020-07-21 00:31:12,579 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 00:31:12,687 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 00:31:12,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 00:31:12,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 00:31:12,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 00:31:12,720 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 00:31:12,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 00:31:12,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139230594] [2020-07-21 00:31:12,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 00:31:12,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 00:31:12,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086083781] [2020-07-21 00:31:12,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 00:31:12,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 00:31:12,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 00:31:12,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 00:31:12,747 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2020-07-21 00:31:12,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 00:31:12,780 INFO L93 Difference]: Finished difference Result 113 states and 177 transitions. [2020-07-21 00:31:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 00:31:12,782 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-21 00:31:12,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 00:31:12,793 INFO L225 Difference]: With dead ends: 113 [2020-07-21 00:31:12,793 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 00:31:12,797 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 00:31:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 00:31:12,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-21 00:31:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 00:31:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-07-21 00:31:12,839 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-07-21 00:31:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 00:31:12,839 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-07-21 00:31:12,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 00:31:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-07-21 00:31:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 00:31:12,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 00:31:12,841 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 00:31:13,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:13,043 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 00:31:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 00:31:13,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-07-21 00:31:13,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 00:31:13,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532488368] [2020-07-21 00:31:13,046 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 00:31:13,176 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 00:31:13,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 00:31:13,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 00:31:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 00:31:13,218 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 00:31:13,264 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 00:31:13,265 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 00:31:13,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 00:31:13,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:31:13 BoogieIcfgContainer [2020-07-21 00:31:13,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 00:31:13,533 INFO L168 Benchmark]: Toolchain (without parser) took 2136.75 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 103.3 MB in the beginning and 101.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 65.9 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:13,534 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 00:31:13,535 INFO L168 Benchmark]: CACSL2BoogieTranslator took 486.70 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 102.9 MB in the beginning and 179.0 MB in the end (delta: -76.1 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:13,536 INFO L168 Benchmark]: Boogie Preprocessor took 52.41 ms. Allocated memory is still 202.9 MB. Free memory was 179.0 MB in the beginning and 177.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:13,537 INFO L168 Benchmark]: RCFGBuilder took 541.44 ms. Allocated memory is still 202.9 MB. Free memory was 176.4 MB in the beginning and 148.2 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:13,538 INFO L168 Benchmark]: TraceAbstraction took 1050.34 ms. Allocated memory is still 202.9 MB. Free memory was 148.2 MB in the beginning and 101.4 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. [2020-07-21 00:31:13,542 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 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 486.70 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 102.9 MB in the beginning and 179.0 MB in the end (delta: -76.1 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.41 ms. Allocated memory is still 202.9 MB. Free memory was 179.0 MB in the beginning and 177.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 541.44 ms. Allocated memory is still 202.9 MB. Free memory was 176.4 MB in the beginning and 148.2 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1050.34 ms. Allocated memory is still 202.9 MB. Free memory was 148.2 MB in the beginning and 101.4 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 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)=7, \old(Zero_fmod)=5, one_fmod=1, Zero_fmod={8368:0}] [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={8368:0}] [L131] CALL, EXPR fmod_float(x, y) VAL [\old(x)=0, \old(y)=9, one_fmod=1, Zero_fmod={8368:0}] [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={8368:0}] [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=10450, x=0, y=9, Zero_fmod={8368:0}] [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=10450, x=0, y=9, Zero_fmod={8368:0}] [L131] RET, EXPR fmod_float(x, y) VAL [fmod_float(x, y)=10, one_fmod=1, x=0, y=9, Zero_fmod={8368:0}] [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={8368:0}] [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={8368:0}] - 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, 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...