/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 DAGSIZE --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_0720.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:07:34,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:07:34,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:07:35,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:07:35,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:07:35,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:07:35,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:07:35,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:07:35,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:07:35,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:07:35,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:07:35,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:07:35,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:07:35,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:07:35,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:07:35,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:07:35,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:07:35,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:07:35,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:07:35,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:07:35,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:07:35,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:07:35,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:07:35,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:07:35,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:07:35,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:07:35,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:07:35,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:07:35,073 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 21:07:35,106 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:07:35,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:07:35,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:07:35,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:07:35,112 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:07:35,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:07:35,112 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:07:35,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:07:35,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:07:35,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:07:35,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:07:35,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:07:35,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:07:35,113 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:07:35,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:07:35,114 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:07:35,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:07:35,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:07:35,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:07:35,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:07:35,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:07:35,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:07:35,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:07:35,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:07:35,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:07:35,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:07:35,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:35,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:07:35,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:07:35,118 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 -> DAGSIZE 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 21:07:35,392 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:07:35,404 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:07:35,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:07:35,408 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:07:35,409 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:07:35,409 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-07-20 21:07:35,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f3a819b/eb4d900abc0b42f584dc8bb98bea93a3/FLAGf47220a01 [2020-07-20 21:07:35,977 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:07:35,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-07-20 21:07:35,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f3a819b/eb4d900abc0b42f584dc8bb98bea93a3/FLAGf47220a01 [2020-07-20 21:07:36,348 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f3a819b/eb4d900abc0b42f584dc8bb98bea93a3 [2020-07-20 21:07:36,356 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:07:36,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:07:36,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:07:36,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:07:36,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:07:36,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:36" (1/1) ... [2020-07-20 21:07:36,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f73ff49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36, skipping insertion in model container [2020-07-20 21:07:36,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:36" (1/1) ... [2020-07-20 21:07:36,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:07:36,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:07:36,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:07:36,597 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:07:36,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:07:36,737 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:07:36,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36 WrapperNode [2020-07-20 21:07:36,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:07:36,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:07:36,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:07:36,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:07:36,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36" (1/1) ... [2020-07-20 21:07:36,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36" (1/1) ... [2020-07-20 21:07:36,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36" (1/1) ... [2020-07-20 21:07:36,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36" (1/1) ... [2020-07-20 21:07:36,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36" (1/1) ... [2020-07-20 21:07:36,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36" (1/1) ... [2020-07-20 21:07:36,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36" (1/1) ... [2020-07-20 21:07:36,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:07:36,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:07:36,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:07:36,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:07:36,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36" (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 21:07:36,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:07:36,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:07:36,861 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-07-20 21:07:36,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-07-20 21:07:36,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:07:36,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:07:36,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-20 21:07:36,862 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-07-20 21:07:36,862 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-07-20 21:07:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 21:07:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 21:07:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:07:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:07:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:07:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 21:07:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:07:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:07:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:07:37,228 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:07:37,228 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 21:07:37,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:37 BoogieIcfgContainer [2020-07-20 21:07:37,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:07:37,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:07:37,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:07:37,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:07:37,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:07:36" (1/3) ... [2020-07-20 21:07:37,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497ff425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:37, skipping insertion in model container [2020-07-20 21:07:37,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:36" (2/3) ... [2020-07-20 21:07:37,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497ff425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:37, skipping insertion in model container [2020-07-20 21:07:37,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:37" (3/3) ... [2020-07-20 21:07:37,244 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c [2020-07-20 21:07:37,254 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:07:37,261 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:07:37,272 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:07:37,293 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:07:37,294 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:07:37,294 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:07:37,294 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:07:37,294 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:07:37,294 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:07:37,294 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:07:37,294 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:07:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-07-20 21:07:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:07:37,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:37,320 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 21:07:37,320 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash 159633202, now seen corresponding path program 1 times [2020-07-20 21:07:37,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:37,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585180216] [2020-07-20 21:07:37,333 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 21:07:37,446 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:07:37,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:07:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 21:07:37,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:07:37,483 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 21:07:37,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:07:37,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585180216] [2020-07-20 21:07:37,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:07:37,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 21:07:37,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052730511] [2020-07-20 21:07:37,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 21:07:37,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:07:37,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 21:07:37,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 21:07:37,511 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2020-07-20 21:07:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:07:37,538 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2020-07-20 21:07:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 21:07:37,539 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 21:07:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:07:37,550 INFO L225 Difference]: With dead ends: 84 [2020-07-20 21:07:37,551 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 21:07:37,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 21:07:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 21:07:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 21:07:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 21:07:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-07-20 21:07:37,597 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 21 [2020-07-20 21:07:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:07:37,598 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-07-20 21:07:37,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 21:07:37,598 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-07-20 21:07:37,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:07:37,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:37,600 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, 1] [2020-07-20 21:07:37,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:37,814 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:37,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1643831456, now seen corresponding path program 1 times [2020-07-20 21:07:37,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:37,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266434188] [2020-07-20 21:07:37,818 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 21:07:37,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:07:37,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:07:37,903 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:07:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:07:37,922 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:07:37,948 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:07:37,948 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:07:38,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:38,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:07:38 BoogieIcfgContainer [2020-07-20 21:07:38,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:07:38,199 INFO L168 Benchmark]: Toolchain (without parser) took 1840.52 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 104.2 MB in the beginning and 115.9 MB in the end (delta: -11.7 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:38,201 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 21:07:38,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.95 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.8 MB in the beginning and 182.0 MB in the end (delta: -78.2 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:38,203 INFO L168 Benchmark]: Boogie Preprocessor took 46.90 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 179.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:38,205 INFO L168 Benchmark]: RCFGBuilder took 448.22 ms. Allocated memory is still 203.9 MB. Free memory was 179.9 MB in the beginning and 158.3 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:38,206 INFO L168 Benchmark]: TraceAbstraction took 961.33 ms. Allocated memory is still 203.9 MB. Free memory was 157.6 MB in the beginning and 115.9 MB in the end (delta: 41.8 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:38,214 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 378.95 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.8 MB in the beginning and 182.0 MB in the end (delta: -78.2 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.90 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 179.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 448.22 ms. Allocated memory is still 203.9 MB. Free memory was 179.9 MB in the beginning and 158.3 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 961.33 ms. Allocated memory is still 203.9 MB. Free memory was 157.6 MB in the beginning and 115.9 MB in the end (delta: 41.8 MB). Peak memory consumption was 41.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 96]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 13, overapproximation of someBinaryArithmeticFLOAToperation at line 30, overapproximation of bitwiseAnd at line 27. Possible FailurePath: [L15] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; VAL [\old(one_sqrt)=2, \old(tiny_sqrt)=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L91] float x = 0.0f / 0.0f; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L92] CALL, EXPR __ieee754_sqrtf(x) VAL [\old(x)=6, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L18] float z; [L19] __uint32_t r, hx; [L20] __int32_t ix, s, q, m, t, i; VAL [\old(x)=6, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6] [L23] ieee_float_shape_type gf_u; [L24] gf_u.value = (x) [L25] EXPR gf_u.word [L25] (ix) = gf_u.word [L27] hx = ix & 0x7fffffff VAL [\old(x)=6, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6] [L29] COND TRUE !((hx) < 0x7f800000L) [L30] return x * x + x; VAL [\old(x)=6, hx=-2155872256, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6] [L92] RET, EXPR __ieee754_sqrtf(x) VAL [__ieee754_sqrtf(x)=7, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6] [L92] float res = __ieee754_sqrtf(x); [L95] CALL, EXPR isnan_float(res) VAL [\old(x)=7, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000] [L13] return x != x; VAL [\old(x)=7, \result=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=7] [L95] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, one_sqrt=1, res=7, tiny_sqrt=1/1000000000000000000000000000000, x=6] [L95] COND TRUE !isnan_float(res) [L96] __VERIFIER_error() VAL [one_sqrt=1, res=7, tiny_sqrt=1/1000000000000000000000000000000, x=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 46 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: 56 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred 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, 43 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 SizeOfPredicates, 0 NumberOfNonLiveVariables, 76 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...