/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_FUNCTIONS --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_1011b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:06:04,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:06:04,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:06:04,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:06:04,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:06:04,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:06:04,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:06:04,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:06:04,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:06:04,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:06:04,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:06:04,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:06:04,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:06:04,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:06:04,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:06:04,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:06:04,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:06:04,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:06:04,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:06:04,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:06:04,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:06:04,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:06:04,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:06:04,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:06:04,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:06:04,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:06:04,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:06:04,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:06:04,545 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 13:06:04,559 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:06:04,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:06:04,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:06:04,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:06:04,561 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:06:04,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:06:04,562 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:06:04,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:06:04,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:06:04,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:06:04,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:06:04,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:06:04,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:06:04,563 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:06:04,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:06:04,563 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:06:04,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:06:04,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:06:04,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:06:04,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:06:04,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:06:04,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:06:04,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:06:04,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:06:04,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:06:04,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:06:04,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:04,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:06:04,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:06:04,566 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_FUNCTIONS 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 13:06:04,880 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:06:04,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:06:04,897 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:06:04,898 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:06:04,899 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:06:04,900 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011b.c [2020-07-20 13:06:04,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b22009d5/ee4065bb4d2a4ce8b1311d347e2ae6f0/FLAGacdb20c8d [2020-07-20 13:06:05,396 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:06:05,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1011b.c [2020-07-20 13:06:05,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b22009d5/ee4065bb4d2a4ce8b1311d347e2ae6f0/FLAGacdb20c8d [2020-07-20 13:06:05,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b22009d5/ee4065bb4d2a4ce8b1311d347e2ae6f0 [2020-07-20 13:06:05,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:06:05,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:06:05,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:05,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:06:05,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:06:05,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:05" (1/1) ... [2020-07-20 13:06:05,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d36612f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:05, skipping insertion in model container [2020-07-20 13:06:05,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:05" (1/1) ... [2020-07-20 13:06:05,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:06:05,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:06:06,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:06,077 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:06:06,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:06,128 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:06:06,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:06 WrapperNode [2020-07-20 13:06:06,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:06,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:06:06,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:06:06,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:06:06,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:06" (1/1) ... [2020-07-20 13:06:06,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:06" (1/1) ... [2020-07-20 13:06:06,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:06" (1/1) ... [2020-07-20 13:06:06,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:06" (1/1) ... [2020-07-20 13:06:06,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:06" (1/1) ... [2020-07-20 13:06:06,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:06" (1/1) ... [2020-07-20 13:06:06,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:06" (1/1) ... [2020-07-20 13:06:06,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:06:06,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:06:06,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:06:06,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:06:06,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:06" (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 13:06:06,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:06:06,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:06:06,322 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2020-07-20 13:06:06,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-20 13:06:06,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:06:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:06:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 13:06:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2020-07-20 13:06:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 13:06:06,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 13:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 13:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 13:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 13:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-20 13:06:06,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:06:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:06:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:06:06,596 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:06:06,596 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 13:06:06,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:06 BoogieIcfgContainer [2020-07-20 13:06:06,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:06:06,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:06:06,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:06:06,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:06:06,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:05" (1/3) ... [2020-07-20 13:06:06,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5067ed2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:06, skipping insertion in model container [2020-07-20 13:06:06,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:06" (2/3) ... [2020-07-20 13:06:06,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5067ed2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:06, skipping insertion in model container [2020-07-20 13:06:06,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:06" (3/3) ... [2020-07-20 13:06:06,612 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1011b.c [2020-07-20 13:06:06,625 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:06:06,634 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:06:06,652 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:06:06,681 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:06:06,681 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:06:06,681 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:06:06,681 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:06:06,681 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:06:06,682 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:06:06,682 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:06:06,682 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:06:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 13:06:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 13:06:06,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:06,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:06,710 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:06,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:06,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2014572178, now seen corresponding path program 1 times [2020-07-20 13:06:06,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:06,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675690091] [2020-07-20 13:06:06,729 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 13:06:06,817 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:06,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:06,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 13:06:06,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:06,846 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 13:06:06,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:06,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675690091] [2020-07-20 13:06:06,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:06,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 13:06:06,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822966485] [2020-07-20 13:06:06,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 13:06:06,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:06,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 13:06:06,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 13:06:06,868 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-20 13:06:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:06,889 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-20 13:06:06,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 13:06:06,890 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-20 13:06:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:06,897 INFO L225 Difference]: With dead ends: 56 [2020-07-20 13:06:06,897 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 13:06:06,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 13:06:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 13:06:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 13:06:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 13:06:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-07-20 13:06:06,939 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 17 [2020-07-20 13:06:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:06,940 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-07-20 13:06:06,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 13:06:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-07-20 13:06:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:06:06,941 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:06,941 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 13:06:07,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:07,156 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:07,158 INFO L82 PathProgramCache]: Analyzing trace with hash 516358161, now seen corresponding path program 1 times [2020-07-20 13:06:07,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:07,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29790845] [2020-07-20 13:06:07,160 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 13:06:07,237 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:07,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:06:07,238 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:06:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:06:07,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:06:07,295 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:06:07,295 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:06:07,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:07,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:06:07 BoogieIcfgContainer [2020-07-20 13:06:07,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:06:07,547 INFO L168 Benchmark]: Toolchain (without parser) took 1723.78 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 124.2 MB in the end (delta: -21.0 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:07,548 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 13:06:07,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.81 ms. Allocated memory is still 138.4 MB. Free memory was 103.0 MB in the beginning and 92.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:07,550 INFO L168 Benchmark]: Boogie Preprocessor took 123.81 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 179.2 MB in the end (delta: -86.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:07,551 INFO L168 Benchmark]: RCFGBuilder took 347.54 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 161.5 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:07,552 INFO L168 Benchmark]: TraceAbstraction took 939.20 ms. Allocated memory is still 201.9 MB. Free memory was 161.5 MB in the beginning and 124.2 MB in the end (delta: 37.2 MB). Peak memory consumption was 37.2 MB. Max. memory is 7.1 GB. [2020-07-20 13:06:07,557 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 138.4 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.81 ms. Allocated memory is still 138.4 MB. Free memory was 103.0 MB in the beginning and 92.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.81 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 179.2 MB in the end (delta: -86.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 347.54 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 161.5 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 939.20 ms. Allocated memory is still 201.9 MB. Free memory was 161.5 MB in the beginning and 124.2 MB in the end (delta: 37.2 MB). Peak memory consumption was 37.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 50]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 49, overapproximation of someUnaryFLOAToperation at line 45, overapproximation of bitwiseAnd at line 21. Possible FailurePath: [L45] float x = -0.0f; [L46] CALL, EXPR fabs_float(x) VAL [\old(x)=5] [L13] __uint32_t ix; VAL [\old(x)=5, x=5] [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (ix) = gf_u.word [L20] ieee_float_shape_type sf_u; [L21] sf_u.word = (ix & 0x7fffffff) [L22] EXPR sf_u.value [L22] (x) = sf_u.value [L24] return x; VAL [\old(x)=5, \result=1, ix=10, x=1] [L46] RET, EXPR fabs_float(x) VAL [fabs_float(x)=1, x=5] [L46] float res = fabs_float(x); [L49] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=1, res == 0.0f && __signbit_float(res) == 0=0, x=5] [L49] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L50] __VERIFIER_error() VAL [res=1, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 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: 32 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 36 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 256 SizeOfPredicates, 0 NumberOfNonLiveVariables, 45 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...