/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:27:10,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:27:10,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:27:10,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:27:10,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:27:10,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:27:10,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:27:10,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:27:10,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:27:10,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:27:10,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:27:10,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:27:10,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:27:10,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:27:10,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:27:10,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:27:10,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:27:10,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:27:10,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:27:10,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:27:10,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:27:10,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:27:10,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:27:10,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:27:10,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:27:10,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:27:10,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:27:10,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:27:10,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:27:10,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:27:10,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:27:10,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:27:10,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:27:10,328 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:27:10,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:27:10,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:27:10,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:27:10,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:27:10,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:27:10,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:27:10,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:27:10,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:27:10,330 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:27:10,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:27:10,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:27:10,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:27:10,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:27:10,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:27:10,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:27:10,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:27:10,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:27:10,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:27:10,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:27:10,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:27:10,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:27:10,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:10,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:27:10,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:27:10,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:27:10,666 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:27:10,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:27:10,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:27:10,692 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:27:10,695 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:27:10,696 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-07-20 16:27:10,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b921f2b9c/16712cdca66b4105b7014bb1604fa707/FLAG5d698f06a [2020-07-20 16:27:11,208 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:27:11,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-07-20 16:27:11,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b921f2b9c/16712cdca66b4105b7014bb1604fa707/FLAG5d698f06a [2020-07-20 16:27:11,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b921f2b9c/16712cdca66b4105b7014bb1604fa707 [2020-07-20 16:27:11,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:27:11,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:27:11,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:27:11,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:27:11,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:27:11,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:27:11" (1/1) ... [2020-07-20 16:27:11,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdc16c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11, skipping insertion in model container [2020-07-20 16:27:11,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:27:11" (1/1) ... [2020-07-20 16:27:11,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:27:11,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:27:11,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:27:11,826 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:27:11,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:27:11,967 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:27:11,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11 WrapperNode [2020-07-20 16:27:11,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:27:11,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:27:11,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:27:11,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:27:11,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11" (1/1) ... [2020-07-20 16:27:11,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11" (1/1) ... [2020-07-20 16:27:11,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11" (1/1) ... [2020-07-20 16:27:11,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11" (1/1) ... [2020-07-20 16:27:12,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11" (1/1) ... [2020-07-20 16:27:12,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11" (1/1) ... [2020-07-20 16:27:12,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11" (1/1) ... [2020-07-20 16:27:12,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:27:12,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:27:12,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:27:12,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:27:12,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11" (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 [2020-07-20 16:27:12,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:27:12,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:27:12,078 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 16:27:12,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 16:27:12,078 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2020-07-20 16:27:12,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:27:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:27:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-20 16:27:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 16:27:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 16:27:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 16:27:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2020-07-20 16:27:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 16:27:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 16:27:12,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 16:27:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 16:27:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 16:27:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 16:27:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:27:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:27:12,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:27:12,392 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:27:12,392 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:27:12,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:27:12 BoogieIcfgContainer [2020-07-20 16:27:12,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:27:12,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:27:12,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:27:12,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:27:12,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:27:11" (1/3) ... [2020-07-20 16:27:12,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d87768a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:27:12, skipping insertion in model container [2020-07-20 16:27:12,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:27:11" (2/3) ... [2020-07-20 16:27:12,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d87768a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:27:12, skipping insertion in model container [2020-07-20 16:27:12,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:27:12" (3/3) ... [2020-07-20 16:27:12,406 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-07-20 16:27:12,417 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:27:12,424 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:27:12,439 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:27:12,461 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:27:12,461 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:27:12,461 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:27:12,461 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:27:12,461 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:27:12,461 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:27:12,462 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:27:12,462 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:27:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-20 16:27:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 16:27:12,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:27:12,487 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 16:27:12,488 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:27:12,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:27:12,494 INFO L82 PathProgramCache]: Analyzing trace with hash -306508764, now seen corresponding path program 1 times [2020-07-20 16:27:12,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:27:12,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400288761] [2020-07-20 16:27:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:12,658 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:27:12,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:27:12,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 16:27:12,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:27:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:27:12,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:27:12,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400288761] [2020-07-20 16:27:12,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:27:12,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 16:27:12,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002728281] [2020-07-20 16:27:12,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 16:27:12,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:27:12,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 16:27:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 16:27:12,721 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-07-20 16:27:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:27:12,747 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-07-20 16:27:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 16:27:12,749 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 16:27:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:27:12,759 INFO L225 Difference]: With dead ends: 51 [2020-07-20 16:27:12,760 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 16:27:12,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 16:27:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 16:27:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 16:27:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 16:27:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-20 16:27:12,806 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 22 [2020-07-20 16:27:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:27:12,807 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-20 16:27:12,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 16:27:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-20 16:27:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 16:27:12,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:27:12,809 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 16:27:13,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:13,024 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:27:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:27:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1317626014, now seen corresponding path program 1 times [2020-07-20 16:27:13,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:27:13,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464745944] [2020-07-20 16:27:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:13,118 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 16:27:13,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 16:27:13,119 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 16:27:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 16:27:13,146 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 16:27:13,179 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 16:27:13,179 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 16:27:13,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:27:13,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:27:13 BoogieIcfgContainer [2020-07-20 16:27:13,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 16:27:13,438 INFO L168 Benchmark]: Toolchain (without parser) took 1853.30 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 103.2 MB in the beginning and 110.9 MB in the end (delta: -7.7 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:13,439 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 16:27:13,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 383.03 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 102.8 MB in the beginning and 181.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:13,441 INFO L168 Benchmark]: Boogie Preprocessor took 44.93 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 178.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:13,441 INFO L168 Benchmark]: RCFGBuilder took 383.54 ms. Allocated memory is still 202.4 MB. Free memory was 178.8 MB in the beginning and 160.1 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:13,442 INFO L168 Benchmark]: TraceAbstraction took 1036.39 ms. Allocated memory is still 202.4 MB. Free memory was 160.1 MB in the beginning and 110.9 MB in the end (delta: 49.2 MB). Peak memory consumption was 49.2 MB. Max. memory is 7.1 GB. [2020-07-20 16:27:13,446 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 137.9 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 383.03 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 102.8 MB in the beginning and 181.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.93 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 178.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 383.54 ms. Allocated memory is still 202.4 MB. Free memory was 178.8 MB in the beginning and 160.1 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1036.39 ms. Allocated memory is still 202.4 MB. Free memory was 160.1 MB in the beginning and 110.9 MB in the end (delta: 49.2 MB). Peak memory consumption was 49.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 36, overapproximation of someUnaryDOUBLEoperation at line 18, overapproximation of someBinaryArithmeticDOUBLEoperation at line 49, overapproximation of bitwiseAnd at line 35, overapproximation of someBinaryDOUBLEComparisonOperation at line 63. Possible FailurePath: [L15] double C0 = 1.414213538; [L16] double C1 = 0.229761391; [L17] double C2 = 1.296735525; [L18] double C3 = -0.901098370; [L19] double C4 = 0.493553400; [L20] double C5 = -0.118958666; VAL [\old(C0)=3, \old(C1)=2, \old(C2)=4, \old(C3)=1, \old(C4)=0, \old(C5)=5, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L56] double x,y; [L58] x = __VERIFIER_nondet_double() [L59] CALL assume_abort_if_not(x >= 1. && x <= 1e10) VAL [\old(cond)=1, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, cond=1] [L59] RET assume_abort_if_not(x >= 1. && x <= 1e10) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, x=6] [L61] CALL, EXPR sqrt_custom(x) VAL [\old(a)=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L29] union u x; [L30] double r; [L31] int exp; [L33] x.d = a [L35] EXPR x.i[0] [L35] exp = (x.i[0] & 0x7FF00000) >> 20 [L36] EXPR x.i[0] [L36] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L37] EXPR x.d [L37] r = x.d * 0.5 [L39] r = C1+C2+(C3+(C4+C5*r)*r)*r VAL [\old(a)=6, a=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, exp=-2, x={2:0}] [L41] COND TRUE exp % 2 == 0 [L42] exp++ VAL [\old(a)=6, a=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, exp=-1, x={2:0}] [L48] x.i[0] = (exp/2 + 511) << 20 [L49] EXPR x.d [L49] r = r * x.d [L51] return r; [L51] return r; VAL [\old(a)=6, \result=8, a=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, exp=-1, r=8] [L61] RET, EXPR sqrt_custom(x) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, sqrt_custom(x)=8, x=6] [L61] y = sqrt_custom(x) [L63] CALL __VERIFIER_assert(y >= 0. && y <= 1e6) VAL [\old(cond)=0, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000] [L12] COND TRUE !(cond) VAL [\old(cond)=0, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, cond=0] [L12] __VERIFIER_error() VAL [\old(cond)=0, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 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: 30 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 44 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 121 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...