/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-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:07:10,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 21:07:10,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 21:07:10,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 21:07:10,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:07:10,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:07:10,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:07:11,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:07:11,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:07:11,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:07:11,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:07:11,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:07:11,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:07:11,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:07:11,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:07:11,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:07:11,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:07:11,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:07:11,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:07:11,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:07:11,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:07:11,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:07:11,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:07:11,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:07:11,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:07:11,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:07:11,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:07:11,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:07:11,043 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 21:07:11,068 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:07:11,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:07:11,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:07:11,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:07:11,071 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:07:11,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:07:11,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:07:11,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:07:11,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:07:11,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:07:11,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:07:11,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:07:11,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:07:11,074 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:07:11,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:07:11,075 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:07:11,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:07:11,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:07:11,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:07:11,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:07:11,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:07:11,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:07:11,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:07:11,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:07:11,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:07:11,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:07:11,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:11,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:07:11,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:07:11,077 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 21:07:11,394 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:07:11,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:07:11,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:07:11,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:07:11,414 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:07:11,415 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-07-20 21:07:11,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730abba72/91ffd5207fe747aea05ffcce46869761/FLAG404129117 [2020-07-20 21:07:11,988 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:07:11,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-07-20 21:07:11,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730abba72/91ffd5207fe747aea05ffcce46869761/FLAG404129117 [2020-07-20 21:07:12,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730abba72/91ffd5207fe747aea05ffcce46869761 [2020-07-20 21:07:12,344 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:07:12,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:07:12,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:07:12,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:07:12,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:07:12,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:12" (1/1) ... [2020-07-20 21:07:12,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143da84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12, skipping insertion in model container [2020-07-20 21:07:12,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:12" (1/1) ... [2020-07-20 21:07:12,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:07:12,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:07:12,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:07:12,584 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:07:12,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:07:12,714 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:07:12,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12 WrapperNode [2020-07-20 21:07:12,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:07:12,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:07:12,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:07:12,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:07:12,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12" (1/1) ... [2020-07-20 21:07:12,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12" (1/1) ... [2020-07-20 21:07:12,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12" (1/1) ... [2020-07-20 21:07:12,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12" (1/1) ... [2020-07-20 21:07:12,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12" (1/1) ... [2020-07-20 21:07:12,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12" (1/1) ... [2020-07-20 21:07:12,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12" (1/1) ... [2020-07-20 21:07:12,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:07:12,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:07:12,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:07:12,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:07:12,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12" (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 21:07:12,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:07:12,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:07:12,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 21:07:12,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 21:07:12,814 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2020-07-20 21:07:12,815 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:07:12,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:07:12,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-20 21:07:12,815 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 21:07:12,815 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 21:07:12,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 21:07:12,816 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2020-07-20 21:07:12,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 21:07:12,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-20 21:07:12,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 21:07:12,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 21:07:12,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-20 21:07:12,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 21:07:12,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:07:12,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:07:12,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:07:13,179 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:07:13,179 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 21:07:13,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:13 BoogieIcfgContainer [2020-07-20 21:07:13,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:07:13,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:07:13,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:07:13,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:07:13,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:07:12" (1/3) ... [2020-07-20 21:07:13,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424b99ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:13, skipping insertion in model container [2020-07-20 21:07:13,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:12" (2/3) ... [2020-07-20 21:07:13,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424b99ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:13, skipping insertion in model container [2020-07-20 21:07:13,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:13" (3/3) ... [2020-07-20 21:07:13,202 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-07-20 21:07:13,209 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:07:13,216 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:07:13,230 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:07:13,252 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:07:13,253 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:07:13,253 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:07:13,253 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:07:13,253 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:07:13,253 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:07:13,253 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:07:13,253 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:07:13,271 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-20 21:07:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:07:13,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:13,278 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 21:07:13,279 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash -306508764, now seen corresponding path program 1 times [2020-07-20 21:07:13,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:13,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034012788] [2020-07-20 21:07:13,292 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 21:07:13,434 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:07:13,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:07:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 21:07:13,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:07:13,476 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 21:07:13,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:07:13,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034012788] [2020-07-20 21:07:13,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:07:13,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 21:07:13,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735332371] [2020-07-20 21:07:13,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 21:07:13,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:07:13,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 21:07:13,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 21:07:13,504 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-07-20 21:07:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:07:13,527 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-07-20 21:07:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 21:07:13,529 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 21:07:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:07:13,539 INFO L225 Difference]: With dead ends: 51 [2020-07-20 21:07:13,539 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 21:07:13,543 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 21:07:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 21:07:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 21:07:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 21:07:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-20 21:07:13,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 22 [2020-07-20 21:07:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:07:13,589 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-20 21:07:13,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 21:07:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-20 21:07:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:07:13,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:07:13,590 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 21:07:13,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:13,804 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:07:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:07:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1317626014, now seen corresponding path program 1 times [2020-07-20 21:07:13,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:07:13,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791462021] [2020-07-20 21:07:13,807 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 21:07:13,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 21:07:13,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 21:07:13,955 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:07:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 21:07:13,990 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 21:07:14,037 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 21:07:14,037 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 21:07:14,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:07:14,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:07:14 BoogieIcfgContainer [2020-07-20 21:07:14,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:07:14,289 INFO L168 Benchmark]: Toolchain (without parser) took 1942.15 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 101.4 MB in the beginning and 110.7 MB in the end (delta: -9.3 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:14,290 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 21:07:14,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.81 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 100.9 MB in the beginning and 179.3 MB in the end (delta: -78.3 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:14,292 INFO L168 Benchmark]: Boogie Preprocessor took 41.07 ms. Allocated memory is still 200.8 MB. Free memory was 179.3 MB in the beginning and 176.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:14,293 INFO L168 Benchmark]: RCFGBuilder took 433.28 ms. Allocated memory is still 200.8 MB. Free memory was 176.8 MB in the beginning and 159.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:14,294 INFO L168 Benchmark]: TraceAbstraction took 1091.64 ms. Allocated memory is still 200.8 MB. Free memory was 158.4 MB in the beginning and 110.7 MB in the end (delta: 47.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 7.1 GB. [2020-07-20 21:07:14,298 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 363.81 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 100.9 MB in the beginning and 179.3 MB in the end (delta: -78.3 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.07 ms. Allocated memory is still 200.8 MB. Free memory was 179.3 MB in the beginning and 176.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.28 ms. Allocated memory is still 200.8 MB. Free memory was 176.8 MB in the beginning and 159.1 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1091.64 ms. Allocated memory is still 200.8 MB. Free memory was 158.4 MB in the beginning and 110.7 MB in the end (delta: 47.7 MB). Peak memory consumption was 47.7 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=9, a=6, C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, exp=-1, r=9] [L61] RET, EXPR sqrt_custom(x) VAL [C0=707106769/500000000, C1=229761391/1000000000, C2=51869421/40000000, C4=2467767/5000000, sqrt_custom(x)=9, 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: 1.0s, 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, 122 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...