/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:01:45,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:01:45,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:01:45,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:01:45,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:01:45,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:01:45,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:01:45,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:01:45,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:01:45,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:01:45,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:01:45,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:01:45,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:01:45,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:01:45,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:01:45,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:01:45,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:01:45,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:01:45,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:01:45,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:01:45,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:01:45,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:01:45,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:01:45,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:01:45,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:01:45,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:01:45,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:01:45,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:01:45,642 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:01:45,668 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:01:45,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:01:45,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:01:45,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:01:45,670 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:01:45,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:01:45,670 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:01:45,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:01:45,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:01:45,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:01:45,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:01:45,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:01:45,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:01:45,672 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:01:45,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:01:45,672 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:01:45,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:01:45,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:01:45,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:01:45,673 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:01:45,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:01:45,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:01:45,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:01:45,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:01:45,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:01:45,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:01:45,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:01:45,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:01:45,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:01:45,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:01:45,945 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:01:45,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:01:45,962 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:01:45,963 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:01:45,964 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:01:45,964 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-07-21 22:01:46,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/136950549/be0446eb5b40452fa776c6e669c41386/FLAG4a48b70c2 [2020-07-21 22:01:46,491 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:01:46,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2020-07-21 22:01:46,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/136950549/be0446eb5b40452fa776c6e669c41386/FLAG4a48b70c2 [2020-07-21 22:01:46,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/136950549/be0446eb5b40452fa776c6e669c41386 [2020-07-21 22:01:46,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:01:46,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:01:46,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:01:46,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:01:46,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:01:46,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:01:46" (1/1) ... [2020-07-21 22:01:46,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@baf057a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:46, skipping insertion in model container [2020-07-21 22:01:46,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:01:46" (1/1) ... [2020-07-21 22:01:46,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:01:46,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:01:47,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:01:47,122 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:01:47,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:01:47,291 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:01:47,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:47 WrapperNode [2020-07-21 22:01:47,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:01:47,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:01:47,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:01:47,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:01:47,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:47" (1/1) ... [2020-07-21 22:01:47,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:47" (1/1) ... [2020-07-21 22:01:47,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:47" (1/1) ... [2020-07-21 22:01:47,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:47" (1/1) ... [2020-07-21 22:01:47,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:47" (1/1) ... [2020-07-21 22:01:47,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:47" (1/1) ... [2020-07-21 22:01:47,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:47" (1/1) ... [2020-07-21 22:01:47,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:01:47,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:01:47,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:01:47,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:01:47,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:01:47,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:01:47,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:01:47,393 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 22:01:47,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 22:01:47,394 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2020-07-21 22:01:47,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:01:47,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:01:47,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-21 22:01:47,394 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 22:01:47,394 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 22:01:47,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 22:01:47,395 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2020-07-21 22:01:47,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 22:01:47,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 22:01:47,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:01:47,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:01:47,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 22:01:47,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:01:47,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:01:47,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:01:47,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:01:47,723 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:01:47,724 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:01:47,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:01:47 BoogieIcfgContainer [2020-07-21 22:01:47,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:01:47,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:01:47,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:01:47,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:01:47,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:01:46" (1/3) ... [2020-07-21 22:01:47,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c173eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:01:47, skipping insertion in model container [2020-07-21 22:01:47,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:01:47" (2/3) ... [2020-07-21 22:01:47,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c173eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:01:47, skipping insertion in model container [2020-07-21 22:01:47,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:01:47" (3/3) ... [2020-07-21 22:01:47,736 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2020-07-21 22:01:47,747 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:01:47,754 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:01:47,766 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:01:47,790 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:01:47,791 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:01:47,791 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:01:47,791 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:01:47,791 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:01:47,791 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:01:47,792 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:01:47,792 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:01:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-21 22:01:47,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 22:01:47,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:01:47,818 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] [2020-07-21 22:01:47,818 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:01:47,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:01:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash -306508764, now seen corresponding path program 1 times [2020-07-21 22:01:47,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:01:47,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448059010] [2020-07-21 22:01:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:01:47,966 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:01:47,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:01:47,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 22:01:47,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:01:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:01:47,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:01:48,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448059010] [2020-07-21 22:01:48,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:01:48,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 22:01:48,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660949086] [2020-07-21 22:01:48,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 22:01:48,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:01:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 22:01:48,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 22:01:48,025 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-07-21 22:01:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:01:48,047 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-07-21 22:01:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 22:01:48,049 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 22:01:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:01:48,059 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:01:48,059 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 22:01:48,063 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 [2020-07-21 22:01:48,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 22:01:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 22:01:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 22:01:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-21 22:01:48,107 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 22 [2020-07-21 22:01:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:01:48,108 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-21 22:01:48,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 22:01:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-21 22:01:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 22:01:48,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:01:48,110 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] [2020-07-21 22:01:48,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:01:48,325 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:01:48,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:01:48,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1317626014, now seen corresponding path program 1 times [2020-07-21 22:01:48,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:01:48,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209759697] [2020-07-21 22:01:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:01:48,470 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:01:48,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 22:01:48,471 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:01:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 22:01:48,498 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 22:01:48,529 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 22:01:48,530 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 22:01:48,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:01:48,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:01:48 BoogieIcfgContainer [2020-07-21 22:01:48,798 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:01:48,802 INFO L168 Benchmark]: Toolchain (without parser) took 1927.00 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 102.7 MB in the beginning and 114.4 MB in the end (delta: -11.7 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. [2020-07-21 22:01:48,803 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 22:01:48,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 415.55 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 102.2 MB in the beginning and 181.9 MB in the end (delta: -79.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:01:48,805 INFO L168 Benchmark]: Boogie Preprocessor took 40.83 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 179.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:01:48,806 INFO L168 Benchmark]: RCFGBuilder took 394.62 ms. Allocated memory is still 203.4 MB. Free memory was 179.5 MB in the beginning and 162.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-21 22:01:48,807 INFO L168 Benchmark]: TraceAbstraction took 1069.18 ms. Allocated memory is still 203.4 MB. Free memory was 161.4 MB in the beginning and 114.4 MB in the end (delta: 47.0 MB). Peak memory consumption was 47.0 MB. Max. memory is 7.1 GB. [2020-07-21 22:01:48,811 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 415.55 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 102.2 MB in the beginning and 181.9 MB in the end (delta: -79.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.83 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 179.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.62 ms. Allocated memory is still 203.4 MB. Free memory was 179.5 MB in the beginning and 162.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1069.18 ms. Allocated memory is still 203.4 MB. Free memory was 161.4 MB in the beginning and 114.4 MB in the end (delta: 47.0 MB). Peak memory consumption was 47.0 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)=4, \old(C1)=2, \old(C2)=5, \old(C3)=1, \old(C4)=0, \old(C5)=3, 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: 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, 34 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 83 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...